第01讲 Unit 1 & 2 同步语法：时间状语从句（知识全梳理&考点精准练）-【暑假自学课】2025年新八年级英语暑假提升精品讲义（沪教版五四制2024）

第01讲 Unit 1&2同步语法：时间状语从句 （知识全梳理&考点精准练） 内容导航——预习三步曲 第一步：学 析教材 学知识：教材精讲精析、全方位预习 练考点 强知识：7大核心考点精准练 第二步：记 串知识 识框架：思维导图助力掌握知识框架、学习目标复核内容掌握 第三步：测 过关测 稳提升：小试牛刀检测预习效果、查漏补缺快速提升 时间状语从句 1．when, while, as 引导的时间状语从句 when 从句谓语动词为延续性动词或非延续性动词。从句的动作和主句的动作可以同时发生，也可以先后发生。译为“当……时；在……期间”。 while 从句的谓语动词为延续性动词。从句的动作与主句的动作同时发生 as 从句谓语一般为延续性动词。从句的动作与主句的动作同时发生或交替进行，可译为“一边……，一边……；随着……” 2. 比较until和till 此两个连词意义相同。肯定形式表示的意思是＂做某事直至某时＂，动词必须是延续性的。否定形式表达的意思是＂直至某时才做某事＂。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。 肯定句：I slept until midnight. 我一直睡到半夜时醒了。 Wait till I call you. 等着我叫你。 （在肯定句中可用before代替。例如：Let’s get in the wheat before the sun sets.） 否定句：She didn’t arrive until 6 o’clock. 她直到6点才到。 Don’t get off the bus until it has stopped. 公共汽车停稳后再下车。 I didn’t manage to do it until you had explained how. 直到你教我后，我才会做。 区别： （1）until可用于句首，而till通常不用于句首。 Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。 （2）until when 疑问句中，until要放在句首。 —Until when are you staying? —Until next Monday. 注意：否定句可用另外两种句式表示。 （3）Not until...在句首，主句用倒装。 Not until the early years of the 19th century did man know what heat is. 直到19 世纪初，人类才知道热为何物。 Not until I began to work did I realize how much time I had wasted. 直到工作，才认识到我已蹉跎了许多岁月。 （4）It is not until... that... It was not until I began to work that I realized how much time I had wasted. （5）表示＂一……就……＂的结构 hardly/scarcely... when/before, no sooner... than 和as soon as都可以表示＂一……就……＂的意思。 I had hardly / scarcely got home when it began to rain. 刚回家，就下起雨来了。 I had no sooner got home than it began to rain. As soon as I got home, it began to rain. 注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构。 Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain. 3．before与since引导的时间状语从句 (1) before与since的常用句式。 连词 常用句式 before It will be＋一段时间＋before ... 过……时间才…… It will not be/was not long＋before ... 不久就会/没多久就…… It was＋时间段＋before ... 过了……(时间)才…… since It is/has been＋一段时间＋since ... (从句用一般过去时) It was＋一段时间＋since ... (从句用过去完成时) It will be half a year before I come back. (……之后才……) 我半年之后才会来。 It won’t be long before we meet again.（不久就......） 用不了多久我们就会再见面。 It was three days before he came back.（过了......才......） 过了三天他才会来。 (2) since引导的从句如果用非延续性动词，所表示的动作自从句谓语动词所表示的动作开始时算起；若用延续性动词，所表示的动作自从句谓语的动作或状态的完成或结束时算起。 It’s three years since he joined the army.(自从......多久了......) 自从他参军已经三年了。 It's two years since we arrived here. 我们到这儿两年了。 It's three years since we lived here. 我们不住在这里有三年了。 (3) “It be＋时间状语＋that＋其他”构成强调句型，意思是“正是在某一时间发生了某事”。 It was at eight o'clock that we got home. 正是在八点我们到了家。 (4)“It be＋时间点＋when从句”表示“某事发生在什么时间”，it指代时间。 It was six o'clock when we got home. 当我们到家的时候六点了。 4．till, until和not ... until引导的时间状语从句 (1) “延续性动词(肯定式)＋until/till”表示“动作延续到……为止”。 We walked along the river until/till it was dark. 我们沿着河散步，一直到天黑。 (2) “瞬间动词/延续性动词(否定式)＋until/till”表示“直到……才发生”。 He didn't know anything about it until/till I told him. 直到我告诉他，他才知道这件事。 (3) 强调句型：It is/was not until ... that ... It was not until the professor came that we began the experiment. 直到教授来了，我们才开始做实验。 易错点：（1）till不可以置于句首，而until可以。 Until you told me I had no idea of it. 直到你告诉我，我才知道这件事。 （2）not until置于句首，主句要用倒装结构。 Not until the film began did she arrive. 直到电影开始她才到。 题型一:when引导时间状语从句 1．—What were you doing at 8:00 last night? —I was reading a book ________ you called me. A．since B．as soon as C．as far as D．when 2．We were walking on the road ________ a car passed by and hit a tree. A．until B．while C．when D．before 3．_________ I got home, my mother was cooking _________ my father was watching TV. A．When; while B．When; when C．While; while D．While; when 4．Mr Green was talking on the phone ________ I arrived at his office. A．before B．when C．after D．until 5．I was cleaning the room ________ my mother asked me to open the door. A．as B．when C．while D．after 题型二:while引导时间状语从句 6．—I love to listen to rock music ________ I am running. —But I think it is not safe. A．while B．after C．since D．until 7．I was watching TV ________ my brother was writing an email at home at this time last night. A．as soon as B．before C．until D．while 8．Joyce almost fell asleep ________ she was doing her homework. A．if B．though C．as soon as D．while 9．________ Benny was reading a novel, someone knocked at the door. A．If B．While C．Since D．Though 10．While she ______ the newspaper, Granny ______ asleep. A．read; fell B．read; was falling C．was reading; fell D．was reading; was falling 题型三:as引导时间状语从句 11．_______ we got off the bus, we saw two men fighting against each other. A．As B．Because C．Although D．Since 12．He saw the car accident ________ he got off the bus. A．since B．as C．until D．while 13．Just as she prepared to ________ to the next village, two friends arrived in a taxi. A．put off B．get off C．turn off D．set off 14．The audience lost themselves in the beautiful dance ________ the dancers are performing Swan Lake. A．till B．for C．as D．since 15．________ I was going home, it began to rain. A．Until B．As C．Because D．Later 题型四:since引导时间状语从句 16．— You have been in Neijiang for a long time? — Yeah, ________ my parents came here, ________ about ten years. A．when; for B．for; since C．when; in D．since; for 17．I miss Jim so much. I haven’t seen him _______ I moved house. A．for B．since C．if D．when 18．My uncle has worked in the TV station ________ he graduated from university. A．because B．although C．if D．since 19．It has been more than forty years ________ the club was set up. A．since B．although C．unless D．if 20．How time flies! It has been ten years since I ________ him in Xuzhou. A．meet B．met C．have met D．will meet 21．—I can’t believe my eyes. Is that you, Mary? —Yes. It has been almost 20 years ________ we last met. A．since B．before C．after D．until 题型五:before引导时间状语从句 22．You should turn off the lights ______ you leave the room. A．or B．before C．so D．but 23．________ your father recovers, you no longer have anything to worry about. A．After B．Before C．Since D．Until 24．We need to take action to save every drop of water ________ it is too late. A．before B．unless C．because D．until 25．Make sure that there are no mistakes in your papers ________ you turn them in. A．since B．after C．because D．before 26．Boys and girls, read the new words again ________ you forget. A．till B．before C．but D．when 题型六:till/until引导时间状语从句 27．Tom thought his phone was broken ________ his sister pointed out he forgot to turn it on. A．until B．although C．since D．as soon as 28．—Excuse me, is it my turn to have the interview now? —Not yet. Please wait outside __________ we call your name. A．as B．until C．after D．since 29．They will not finish the work on time ________they work together. A．while B．unless C．after D．because 30．I did not realize how important time management was ________ I started middle school. A．unless B．as soon as C．if D．until 31．“After our ship crashed against the rocks, I swam as far as I could.” The underlined word “After” is used to_________. A．connect ideas B．give examples C．show time D．add more information 32．Simon waited ___________ his parents came back last night. A．because B．while C．since D．till 33．—Because of the Double Reduction Policy (双减政策), students go home ________ they finish their homework at school. —Sure. As a parent of a Grade 9 student, I don’t feel so tired as before. A．before B．while C．since D．after 34．I won’t leave the school until my homework________. A．does B．will be done C．are done D．is done 题型七：一...就...表达法 35．I will go to see my grandparents ________ I get off the plane. A．as soon as B．as far as C．as long as D．as easily as 36．We are going to take a trip to Kunming ________ we save enough money. A．so that B．as soon as C．ever since D．even if 37．I couldn’t wait to share it with my parents ______ I got the exciting news. A．until B．as soon as C．because D．though 38．The minute he arrived at the airport, he called me. A．At first B．All the time C．Now D．As soon as 39．—I called 119 ________ I saw the smoke. —Good boy! What you did has saved a family. A．as soon as B．since C．so that D．if 知识导图记忆 状语从句 常用连词 时间状语从句 after, before, once, since, when, while, as, each/every time, till/until/no sooner….than, scarcely…when, hardly…when, whenever, as soon as, by the time 40．There are not so many talents. Many great people just work hard enough ________ their dream comes true. A．if B．when C．until D．unless 41．—I missed the live-broadcast of the Shenzhou-20 launch. —What a pity! It may be a long time ________ you get another exciting moment. A．since B．after C．until D．before 42．—Do you often use emojis (表情符号) ______ sending messages to your friends? —Yes. They are very funny and can help me express myself very well. A．until B．while C．before D．after 43．The host was waiting at the gate________ his guests arrived. A．after B．when C．unless D．if 44．My cousin promised he ________ me as soon as he got Huawei’s job offer. A．had called B．would call C．will call D．has called 45．The dog didn’t stop barking ________ the strangers went far away. A．since B．until C．because D．while 46．James always shares some housework ________ his parents work hard. A．but B．or C．when D．before 47．Tina is very hard-working. She always starts to study ________ she gets home from school. A．as soon as B．as long as C．so that D．even though 48．I didn’t realize he was a famous scientist ________ you told me. A．because B．although C．unless D．until 49．The little boy didn’t stop crying ________ his mother bought him a toy. A．until B．when C．unless D．because 50．Tony will begin to do his homework as soon as he ________ home. A．got B．gets C．is getting D．has got 51．—Passengers had better not use their smart phone ________ they are crossing the street. —Sorry, I won’t do it any more. A．unless B．before C．while D．after 52．We may fail from time to time, but we can learn from failure, correct our mistakes and try again ________ we achieve our goals. A．though B．after C．while D．until 53．We met a nice and friendly neighbor ________ we lived in Shanghai. A．if B．although C．since D．when 54．Love your parents ________ they are alive. Don’t wait until it is too late. A．unless B．although C．until D．while 55．I didn’t understand my teacher’s great love ________ I became a teacher myself. A．if B．until C．since D．because 56．I’m going to do some research into traditional music for my report ________ I write on it. A．though B．before C．as if D．unless 57．We can learn to take turns, share and solve problems ________ we join teams working together. A．or B．but C．when D．whether 58．You will never truly understand your parents’ great love ______ you grow up. A．if B．until C．when D．while 59．________ education in a country develops, the country will develop, and strong education makes a strong nation. A．Although B．Before C．Unless D．When 60．To avoid making mistakes in the exam, we should be more careful ________ we are answering the questions. A．while B．unless C．as soon as D．after 61．Read the instructions carefully before you ________ the machine. A．use B．are using C．used D．have used 62．To reduce waste, we should turn off the tap ________ brushing teeth. A．before B．without C．while D．for 63．— Time to go home now, Lucy. — Wait a moment. I can’t go home ________ I finish cleaning the classroom. A．since B．when C．until D．after 64．—Jack, remember ______ off the lights when ______ your bedroom. —OK, I won’t forget, Mom. A．turning; leaving B．to turn; leaving C．to turn; leave D．turning; left 65．Visitors didn’t realize the beauty of Suqian ______ they came here. A．if B．until C．because D．after 66．— Jack, have you done the survey? — Not yet. I am in New York now. I’ll start it ________ I come back. A．whenever B．as soon as C．before D．after 67．He didn’t go to bed _________ his father came back home. A．because B．although C．until D．if 68．—We have been friends since we ________ in the same neighborhood. —How time flies! A．have lived B．lived C．live D．will live 69．________ I fall ill, my mother always makes warm chicken soup. A．And B．When C．But D．So 70．—When will you go to see your grandpa? —I’ll see him ________ I get off the plane. He is waiting for me at the airport. A．as soon as B．as long as C．as far as D．as easily as 71．We’d better take action to solve a problem ______ it gets worse. A．before B．after C．until D．since 72．—Lily took care of me when I broke my leg. She is a true friend. —I agree. As the saying goes, “A friend is never known ________ a man has need.” A．as B．till C．since D．though 73．—How long is it since he ________ his hometown? —He ________ for nearly 10 years. A．left; left B．has left; has left C．has left; has been away D．left; has been away 74．The wind power of our country develops more quickly ________ we push for green energy. A．though B．before C．as D．until 18 / 18 学科网（北京）股份有限公司 $$ 第01讲 Unit 1&2同步语法：时间状语从句 （知识全梳理&考点精准练） 内容导航——预习三步曲 第一步：学 析教材 学知识：教材精讲精析、全方位预习 练考点 强知识：7大核心考点精准练 第二步：记 串知识 识框架：思维导图助力掌握知识框架、学习目标复核内容掌握 第三步：测 过关测 稳提升：小试牛刀检测预习效果、查漏补缺快速提升 时间状语从句 1．when, while, as 引导的时间状语从句 when 从句谓语动词为延续性动词或非延续性动词。从句的动作和主句的动作可以同时发生，也可以先后发生。译为“当……时；在……期间”。 while 从句的谓语动词为延续性动词。从句的动作与主句的动作同时发生 as 从句谓语一般为延续性动词。从句的动作与主句的动作同时发生或交替进行，可译为“一边……，一边……；随着……” 2. 比较until和till 此两个连词意义相同。肯定形式表示的意思是＂做某事直至某时＂，动词必须是延续性的。否定形式表达的意思是＂直至某时才做某事＂。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。 肯定句：I slept until midnight. 我一直睡到半夜时醒了。 Wait till I call you. 等着我叫你。 （在肯定句中可用before代替。例如：Let’s get in the wheat before the sun sets.） 否定句：She didn’t arrive until 6 o’clock. 她直到6点才到。 Don’t get off the bus until it has stopped. 公共汽车停稳后再下车。 I didn’t manage to do it until you had explained how. 直到你教我后，我才会做。 区别： （1）until可用于句首，而till通常不用于句首。 Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。 （2）until when 疑问句中，until要放在句首。 —Until when are you staying? —Until next Monday. 注意：否定句可用另外两种句式表示。 （3）Not until...在句首，主句用倒装。 Not until the early years of the 19th century did man know what heat is. 直到19 世纪初，人类才知道热为何物。 Not until I began to work did I realize how much time I had wasted. 直到工作，才认识到我已蹉跎了许多岁月。 （4）It is not until... that... It was not until I began to work that I realized how much time I had wasted. （5）表示＂一……就……＂的结构 hardly/scarcely... when/before, no sooner... than 和as soon as都可以表示＂一……就……＂的意思。 I had hardly / scarcely got home when it began to rain. 刚回家，就下起雨来了。 I had no sooner got home than it began to rain. As soon as I got home, it began to rain. 注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构。 Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain. 3．before与since引导的时间状语从句 (1) before与since的常用句式。 连词 常用句式 before It will be＋一段时间＋before ... 过……时间才…… It will not be/was not long＋before ... 不久就会/没多久就…… It was＋时间段＋before ... 过了……(时间)才…… since It is/has been＋一段时间＋since ... (从句用一般过去时) It was＋一段时间＋since ... (从句用过去完成时) It will be half a year before I come back. (……之后才……) 我半年之后才会来。 It won’t be long before we meet again.（不久就......） 用不了多久我们就会再见面。 It was three days before he came back.（过了......才......） 过了三天他才会来。 (2) since引导的从句如果用非延续性动词，所表示的动作自从句谓语动词所表示的动作开始时算起；若用延续性动词，所表示的动作自从句谓语的动作或状态的完成或结束时算起。 It’s three years since he joined the army.(自从......多久了......) 自从他参军已经三年了。 It's two years since we arrived here. 我们到这儿两年了。 It's three years since we lived here. 我们不住在这里有三年了。 (3) “It be＋时间状语＋that＋其他”构成强调句型，意思是“正是在某一时间发生了某事”。 It was at eight o'clock that we got home. 正是在八点我们到了家。 (4)“It be＋时间点＋when从句”表示“某事发生在什么时间”，it指代时间。 It was six o'clock when we got home. 当我们到家的时候六点了。 4．till, until和not ... until引导的时间状语从句 (1) “延续性动词(肯定式)＋until/till”表示“动作延续到……为止”。 We walked along the river until/till it was dark. 我们沿着河散步，一直到天黑。 (2) “瞬间动词/延续性动词(否定式)＋until/till”表示“直到……才发生”。 He didn't know anything about it until/till I told him. 直到我告诉他，他才知道这件事。 (3) 强调句型：It is/was not until ... that ... It was not until the professor came that we began the experiment. 直到教授来了，我们才开始做实验。 易错点：（1）till不可以置于句首，而until可以。 Until you told me I had no idea of it. 直到你告诉我，我才知道这件事。 （2）not until置于句首，主句要用倒装结构。 Not until the film began did she arrive. 直到电影开始她才到。 题型一:when引导时间状语从句 1．—What were you doing at 8:00 last night? —I was reading a book ________ you called me. A．since B．as soon as C．as far as D．when 【答案】D 【详解】句意：——昨晚八点你在干什么？——你打电话给我时，我正在看书。 考查连词辨析。since自从……以来；as soon as一……就；as far as就……而言；when当……的时候。根据“I was reading a book”可知，此处表示当你打电话给我的时候，我正在看书。故选D。 2．We were walking on the road ________ a car passed by and hit a tree. A．until B．while C．when D．before 【答案】C 【详解】句意：我们正走在路上，突然一辆汽车经过，撞到了一棵树上。 考查时间状语从句。until直到；while当……的时候；when在……的时候；before之前。根据“We were walking on the road...a car passed by and hit a tree.”可知，当一辆汽车撞到了一棵树的时候我们正在路上走，排除选项A和D，when引导的从句后面接延续性或短暂性动词，while引导的从句后面接延续性动词，pass by是短暂性动作，用when来引导时间状语从句。故选C。 3．_________ I got home, my mother was cooking _________ my father was watching TV. A．When; while B．When; when C．While; while D．While; when 【答案】A 【详解】句意：当我回到家时，妈妈在做饭，爸爸在看电视。 考查连词。while与when都表示“当……时”。while后用延续性动作，若主从句都用进行时，则表示动词同时进行；when后可用延续性动作或非延续性动作。根据“I got home”可知表示非延续性动作，则用when不用while；根据“my mother was cooking ... my father was watching TV.”可知，妈妈在做饭的时候，爸爸在看电视，表示两个动词同时进行，用while。故选A。 4．Mr Green was talking on the phone ________ I arrived at his office. A．before B．when C．after D．until 【答案】B 【详解】句意：当我到格林先生办公室时，他正在打电话。 考查连词辨析。before在……之前；when当……时；after在……之后；until直到。根据“Mr. Green was talking on the phone...I arrived at his office.”可知，“我”到他的办公室时，他正在打电话；且arrive是非延续性动词，此处应用when引导时间状语从句。故选B。 5．I was cleaning the room ________ my mother asked me to open the door. A．as B．when C．while D．after 【答案】B 【详解】句意：我正在打扫房间，突然妈妈叫我把门打开。 考查连词辨析。as当……时，强调一边做某事一边做某事；when当……时；while当……时，从句动作是延续性的；after在……之后。根据“I was cleaning the room … my mother asked me to open the door.”可知，此处表示“我正在打扫房间的时候，突然妈妈让“我”把门打开”，表示“某人正在做某事，突然……”应用when引导时间状语从句。故选B。 题型二:while引导时间状语从句 6．—I love to listen to rock music ________ I am running. —But I think it is not safe. A．while B．after C．since D．until 【答案】A 【详解】句意：——我喜欢在跑步的时候听摇滚乐。——但我觉得不安全。 考查时间状语从句。while当……时候；after在……之后；since自从；until直到……为止。根据“I love to listen to rock music...I am running.”可知，此处指在跑步时听摇滚乐，应用while引导时间状语从句。故选A。 7．I was watching TV ________ my brother was writing an email at home at this time last night. A．as soon as B．before C．until D．while 【答案】D 【详解】句意：昨晚那个时候我在家看电视，而我弟弟正在写电子邮件。 考查连词辨析。as soon as一……就；before在……之前；until直到；while当……时候。根据“I was watching TV...my brother was writing an email at home at that time last nigt”可知，前后句动作同时发生，应用while引导，故选D。 8．Joyce almost fell asleep ________ she was doing her homework. A．if B．though C．as soon as D．while 【答案】D 【详解】句意：乔伊斯在做作业时几乎睡着了。 考查连词辨析。if如果；though尽管；as soon as一……就；while当……时。根据“she was doing her homework.”可知，乔伊斯在做作业时几乎睡着了，故选D。 9．________ Benny was reading a novel, someone knocked at the door. A．If B．While C．Since D．Though 【答案】B 【详解】句意：当Benny在看一本小说时，有人敲门。 考查从属连词辨析。If如果；While在……期间、与……同时；Since自从；Though虽然。根据“Benny was reading a novel”和“someone knocked at the door”可知，应选While，引导时间状语从句。故选B。             10．While she ______ the newspaper, Granny ______ asleep. A．read; fell B．read; was falling C．was reading; fell D．was reading; was falling 【答案】C 【详解】句意：当她在看报纸的时候。奶奶睡着了。 考查时态。read 阅读，延续性动词；fall asleep 睡着，短暂性动词短语。While引导时间状语从句时，若主从句的动作均发生在过去，主句的动作在从句的动作进行的过程中发生，且从句谓语动词是延续性动词而主句谓语动词是短暂性动词，从句是过去进行时，而主句是一般过去时，第一空填was reading，第二空填fell。故选C。 题型三:as引导时间状语从句 11．_______ we got off the bus, we saw two men fighting against each other. A．As B．Because C．Although D．Since 【答案】A 【详解】句意：当我们下车时，我们看到两个人在互相打架。 考查连词辨析。As引导时间状语从句，表示“当……”，强调主句和从句的动作同时发生；Because 因为，引导原因状语从句；Although 尽管，引导让步状语从句；Since自从，引导时间状语从句。分析语境可知，前半句是一个时间状语从句，空处表示“当”。故选A。 12．He saw the car accident ________ he got off the bus. A．since B．as C．until D．while 【答案】B 【详解】句意：他一下车就看到了车祸。 考查连词辨析。since因为；as当……时；until直到；while当……时，后接持续性动词。根据“He saw the car accident”和“he got off the bus”可知两个短暂性动作同时发生，as符合句意。故选B。 13．Just as she prepared to ________ to the next village, two friends arrived in a taxi. A．put off B．get off C．turn off D．set off 【答案】D 【详解】句意：正当她准备出发去下一个村子时，两个朋友乘出租车到了。 考查动词短语辨析。put off推迟；get off下车，脱下；turn off关掉；set off出发，启程。这些都是固定搭配。结合句意分析句子结构可知，本句是as引导的时间状语从句，侧重表示两个动作同时发生。as意为“当……时”，主句two friends arrived in a taxi.表示“两个朋友到了”，所以从句表示“某人正准备出发去下一个村”符合语境。故选D。 14．The audience lost themselves in the beautiful dance ________ the dancers are performing Swan Lake. A．till B．for C．as D．since 【答案】C 【详解】句意：当舞者们表演《天鹅湖》时，观众们沉浸在美丽的舞蹈中。 考查连词辨析。till直到；for因为；as当……时候；since自从。根据“The audience lost themselves in the beautiful dance....the dancers are performing Swan Lake.”可知，可以用as引导时间状语从句，表示“当舞者们在表演《天鹅湖》时”，故选C。 15．________ I was going home, it began to rain. A．Until B．As C．Because D．Later 【答案】B 【详解】句意：我正要回家的时候，天开始下雨了。 考查连词辨析。until直到；as当；because因为；later之后。根据“I was going home, it began to rain”可知是当要回家时，开始下雨，用as引导时间状语从句。故选B。 题型四:since引导时间状语从句 16．— You have been in Neijiang for a long time? — Yeah, ________ my parents came here, ________ about ten years. A．when; for B．for; since C．when; in D．since; for 【答案】D 【详解】句意：—— 你在内江待了很久了吗？ —— 是的，自从我父母来到这里，大约有十年了。 考查时间状语从句和介词辨析。when当……；in在……里面；since自从；for持续，加一段时间。根据“my parents came here”可知，第一空表示“自从我父母来到这里”；根据“about ten years”可知，for后接时间段，用来表示动作持续的时间长度。故选D。 17．I miss Jim so much. I haven’t seen him _______ I moved house. A．for B．since C．if D．when 【答案】B 【详解】句意：我十分想念吉姆。自从我搬家，就没见过他。 考查连词。for介词，在现在完成时中加一般时间；since自从，引导时间状语从句；if如果，引导条件状语从句；when当……时候，引导时间状语从句。根据“I haven’t seen him...I moved house.”可知，该句从句为一般过去时，主句为现在完成时，所以应用since引导时间状语从句，故选B。 18．My uncle has worked in the TV station ________ he graduated from university. A．because B．although C．if D．since 【答案】D 【详解】句意：我的叔叔自从大学毕业以来，就一直在电视台工作。 考查连词词义辨析。because因为，引导原因状语从句；although尽管，引导让步状语从句；if如果，引导条件状语从句；since自从，引导时间状语从句 。根据句中“has worked”为现在完成时，以及“he graduated from university”为一般过去时可知，从大学毕业这个时间点开始一直持续到现在的动作，存在时间上的先后关系，since符合语境，且since是现在完成时的标志词。故选D。 19．It has been more than forty years ________ the club was set up. A．since B．although C．unless D．if 【答案】A 【详解】句意：从俱乐部成立到现在已经有四十多年了。 考查连词辨析。since自从；although尽管、虽然；unless除非；if如果。根据“It has been more than forty years...the club was set up.”可知，此处表示自从俱乐部成立，到现在已经有四十多年了。故选A。 20．How time flies! It has been ten years since I ________ him in Xuzhou. A．meet B．met C．have met D．will meet 【答案】B 【详解】句意：时间过得真快！我在徐州见到他已经十年了。 考查一般过去时。meet遇见，一般现在时；met遇见，一般过去时；have met已经遇见，现在完成时；will meet将会遇见，一般将来时。since引导的时间状语从句用一般过去时，主句用现在完成时。故选B。 21．—I can’t believe my eyes. Is that you, Mary? —Yes. It has been almost 20 years ________ we last met. A．since B．before C．after D．until 【答案】A 【详解】句意：——真不敢相信我的眼睛，是你吗，玛丽？——是的，自从我们上次见面已经快20年了。 考查连词辨析。since自从；before在……之前；after在……之后；until直到。根据“It has been almost 20 years ... we last met.”可知，是指自从上次见面已经快20年了。故选A。 题型五:before引导时间状语从句 22．You should turn off the lights ______ you leave the room. A．or B．before C．so D．but 【答案】B 【详解】句意：你应该在离开房间前关灯。 考查连词辨析。or或；before在……之前；so因此；but但是。分析题干和选项可知，此处表示你应该在离开房间前关灯。故选B。 23．________ your father recovers, you no longer have anything to worry about. A．After B．Before C．Since D．Until 【答案】C 【详解】句意：既然你的爸爸恢复了，你再也不用担心了。 考查连词辨析。After在……之后；Before在……之前；Since既然；Until直到。根据前后句关系可知，应是因果关系。故选C。 24．We need to take action to save every drop of water ________ it is too late. A．before B．unless C．because D．until 【答案】A 【详解】句意：在一切太迟了之前，我们需要采取行动节约每一滴水。 考查连词辨析。before在……之前；unless除非；because因为；until直到……为止。由“it is too late”可知此处表示要在一切太迟了之前采取行动，用before引导时间状语从句。故选A。 25．Make sure that there are no mistakes in your papers ________ you turn them in. A．since B．after C．because D．before 【答案】D 【详解】句意：交卷前要确保没有错误。 考查连词辨析。since自从；after在……之后；because因为；before在……之前。结合语境及常识可知，此处指应在上交试卷之前确保试卷没有错误，应用before引导时间状语从句，表示两个动作发生的先后顺序。故选D。 26．Boys and girls, read the new words again ________ you forget. A．till B．before C．but D．when 【答案】B 【详解】句意：男孩女孩们，在你们忘记之前再读一遍新词。 考查连词辨析。till直到；before在……之前；but但是；when当……时候。根据“Boys and girls, read the new words again…you forget.”可知，应是在忘记之前再读一遍生词。故选B。 题型六:till/until引导时间状语从句 27．Tom thought his phone was broken ________ his sister pointed out he forgot to turn it on. A．until B．although C．since D．as soon as 【答案】A 【详解】句意：汤姆以为他的手机坏了，直到他的妹妹指出他忘记开机了。 考查连词辨析。until直到；although虽然；since自从；as soon as一……就……。根据“Tom thought his phone was broken...his sister pointed out he forgot to turn it on.”可知，汤姆一直认为手机坏了，直到妹妹告诉他真相，until“直到”符合语境，故选A。 28．—Excuse me, is it my turn to have the interview now? —Not yet. Please wait outside __________ we call your name. A．as B．until C．after D．since 【答案】B 【详解】句意：——打扰一下，现在轮到我面试了吗？——还没有。请在外面等我们叫你的名字。 考查连词辨析。as当……时，因为；until直到；after在……之后；since自从。根据“Please wait outside … we call your name.”可知，要在外面等着，直到叫名字再进去，用until引导时间状语从句。故选B。 29．They will not finish the work on time ________they work together. A．while B．unless C．after D．because 【答案】B 【详解】句意：除非他们一起工作，不然他们不会准时完成工作。 考查从属连词辨析。while当……时候；unless除非；after在……之后；because因为。根据“They will not finish the work on time”及“they work together.”可知，他们不会准时完成工作和他们一起工作，表条件，用unless除非；除非他们一起工作，不然他们不会准时完成工作，故选B。 30．I did not realize how important time management was ________ I started middle school. A．unless B．as soon as C．if D．until 【答案】D 【详解】句意：直到我开始上中学，我才意识到时间管理有多重要。 考查not...until的用法。unless除非；as soon as一……就；if如果，是否；until直到。根据“did not”可知，空处考查not...until...句型，表示“直到……才……”，故选D。 31．“After our ship crashed against the rocks, I swam as far as I could.” The underlined word “After” is used to_________. A．connect ideas B．give examples C．show time D．add more information 【答案】C 【详解】句意：我们的船撞上礁石后，我游得尽可能远。 考查连词的用法。connect ideas有关联想法；give examples举例；show time出示时间；add more information添加更多信息；after 表示时间连词，在……之后。故选C。 32．Simon waited ___________ his parents came back last night. A．because B．while C．since D．till 【答案】D 【详解】句意：昨晚西蒙一直等到他父母回来。 考查连词辨析。because因为；while当……时候；since自从；till直到。根据“Simon waited...his parents came back last night.”可知，此处指一直等到父母回来。故选D。 33．—Because of the Double Reduction Policy (双减政策), students go home ________ they finish their homework at school. —Sure. As a parent of a Grade 9 student, I don’t feel so tired as before. A．before B．while C．since D．after 【答案】D 【详解】句意：——由于双减政策，学生在学校完成作业后回家。——当然。作为一名九年级学生的家长，我不再像以前那么累了。 考查连词辨析。before在……之前；while当……时候；since自从，既然；after在……之后。根据常识以及“students go home...they finish their homework at school”可知，学生在学校写完作业之后回家。故选D。 34．I won’t leave the school until my homework________. A．does B．will be done C．are done D．is done 【答案】D 【详解】句意：直到我的作业做完，我才会离开学校。 考查时间状语从句的时态及被动语态。does一般现在时；will be done一般将来时的被动语态；are done一般现在时的被动语态；is done一般现在时的被动语态。根据“I won’t leave the school”可知主句是将来时，从句是until引导的时间状语从句，需用一般现在时表示将来。此处指作业被做完，应用一般现在时的被动语态。homework为不可数名词，谓语用单数。故选D。 题型七：一...就...表达法 35．I will go to see my grandparents ________ I get off the plane. A．as soon as B．as far as C．as long as D．as easily as 【答案】A 【详解】句意：我一下飞机就会去看望我的祖父母。 考查时间状语从句。as soon as一……就……”，引导时间状语从句；as far as就……而言；远至；直到；as long as只要（引导条件状语从句），与……一样长；as easily as和……一样容易。根据“I will go to see my grandparents…I get off the plane”可知，句子要表达下飞机这个动作完成后立刻就去看望祖父母，即“一……就……”。故选A。 36．We are going to take a trip to Kunming ________ we save enough money. A．so that B．as soon as C．ever since D．even if 【答案】B 【详解】句意：我们一攒够钱，就要去昆明旅游。 考查从属连词辨析。so that因此；as soon as一……就……；ever since自从；even if即使。根据“we save enough money”可知，一攒够钱就去旅游，因此应用as soon as引导时间状语从句。故选B。 37．I couldn’t wait to share it with my parents ______ I got the exciting news. A．until B．as soon as C．because D．though 【答案】B 【详解】句意：我一得到这个令人兴奋的消息，就迫不及待地和父母分享了。 考查连词辨析和时间状语从句。until直到……为止；as soon as一……就……；because因为；though虽然，尽管。根据句意可知，此句是说一得到好消息就和父母分享。故选B。 38．The minute he arrived at the airport, he called me. A．At first B．All the time C．Now D．As soon as 【答案】D 【详解】句意：他一到达机场，就给我打电话了。 考查短语辨析。At first起初；All the time一直；Now现在；As soon as一……就……。原句表达“一到达机场就打电话”，“As soon as”引导时间状语从句，意为“一……就……” ，符合语境。故选D。 39．—I called 119 ________ I saw the smoke. —Good boy! What you did has saved a family. A．as soon as B．since C．so that D．if 【答案】A 【详解】句意：——我一看到烟雾就拨打了119。——好孩子！你的行为拯救了一个家庭。 考查连词辨析。as soon as一……就……；since自从；so that以便；if如果。根据“I called 119 ...I saw the smoke”可知，应是一看见烟雾就报了火警，强调两个动作的紧接关系，故选A 知识导图记忆 状语从句 常用连词 时间状语从句 after, before, once, since, when, while, as, each/every time, till/until/no sooner….than, scarcely…when, hardly…when, whenever, as soon as, by the time 40．There are not so many talents. Many great people just work hard enough ________ their dream comes true. A．if B．when C．until D．unless 【答案】C 【详解】句意：没有那么多人才。许多伟大的人只是足够努力地工作，直到他们的梦想成真。 考查连词辨析。if如果，引导条件状语从句；when当……时候，引导时间状语从句；until直到……为止，引导时间状语从句，强调动作持续到某一时间点；unless除非，如果不，引导条件状语从句。结合语境可知，此处表示许多伟人努力工作，一直到梦想成真，强调动作持续到梦想成真这个时间点，所以应用until引导时间状语从句，故选C。 41．—I missed the live-broadcast of the Shenzhou-20 launch. —What a pity! It may be a long time ________ you get another exciting moment. A．since B．after C．until D．before 【答案】D 【详解】句意：——我错过了神舟二十号发射的直播。——太可惜了！可能要过很长时间，你才能再遇到这样令人激动的时刻。 考查连词辨析。since自从；after之后；until直到；before之前。“It be+时间段+before...”是固定句型，意为“要过……时间才……”，放入句中表示“要过很长时间，你才会再遇到另一个激动时刻”符合题意。故选D。 42．—Do you often use emojis (表情符号) ______ sending messages to your friends? —Yes. They are very funny and can help me express myself very well. A．until B．while C．before D．after 【答案】B 【详解】句意：——你在给朋友发消息时经常使用表情符号吗？——是的。它们很有趣，能帮助我很好地表达自己。     考查连词辨析。until直到；while当……时候；before在……之前；after在……之后。根据“Do you often use emojis ... sending messages to your friends?”可知，此处表示“在发消息的时候使用表情符号”，强调动作同时发生，故选B。 43．The host was waiting at the gate________ his guests arrived. A．after B．when C．unless D．if 【答案】B 【详解】句意：客人到达时，主人正在门口等候。 考查连词辨析题。 after在……之后；when当……时；unless除非；if如果。根据“The host was waiting at the gate... his guests arrived.”可知，此处表示当客人到达时，主人正在门口等待，when符合主人等待的动作在客人到达的时刻正在发生的语境。故选B。 44．My cousin promised he ________ me as soon as he got Huawei’s job offer. A．had called B．would call C．will call D．has called 【答案】B 【详解】句意：我的表弟答应我他一拿到华为的聘书就马上给我打电话。 考查动词时态。had called已经告诉，过去完成时；would call将会告诉，过去将来时；will call将会告诉，一般将来时；has called已经告诉，现在完成时。根据“as soon as he got Huawei’s job offer.”可知，从句用一般过去时，主句需要使用过去将来时。故选B。 45．The dog didn’t stop barking ________ the strangers went far away. A．since B．until C．because D．while 【答案】B 【详解】句意：这只狗直到陌生人走远才停止吠叫。 考查连词辨析。since自从；until直到；because因为； while当……时候。分析题干可知，此处是not...until“直到……才”结构，表示直到陌生人走远才停止吠叫。故选B。 46．James always shares some housework ________ his parents work hard. A．but B．or C．when D．before 【答案】C 【详解】句意：当父母努力工作时，詹姆斯总是分担一些家务。 考查连词词义辨析。but但是；or或者；when当……时候；before在……之前。根据“James always shares some housework…his parents work hard.”的语境可知，此处主从句动作同时发生，应用when引导时间状语从句。故选C。 47．Tina is very hard-working. She always starts to study ________ she gets home from school. A．as soon as B．as long as C．so that D．even though 【答案】A 【详解】句意：蒂娜非常勤奋。她总是一从学校回到家就开始学习。 考查连词辨析。as soon as一……就……；as long as只要；so that以便；even though尽管。根据“Tina is very hard-working. She always starts to study…she gets home from school.”可知，蒂娜非常勤奋，此处应该是指“她回家后立刻学习”，as soon as符合语境。故选A。 48．I didn’t realize he was a famous scientist ________ you told me. A．because B．although C．unless D．until 【答案】D 【详解】句意：直到你告诉我，我才知道他是一位著名的科学家。 考查连词辨析。because因为；although尽管；unless除非；until直到。not…until…表示“直到……才”，是固定搭配。这里的主句是否定式“didn’t realize”，而从句是“you told me”，所以用until的话，整个句子的意思就是“直到你告诉我，我才意识到他是著名科学家。” 这完全符合逻辑。故选D。 49．The little boy didn’t stop crying ________ his mother bought him a toy. A．until B．when C．unless D．because 【答案】A 【详解】句意：小男孩直到他妈妈给他买了一个玩具才停止哭泣。 考查连词辨析。until直到；when当……时；unless除非；because因为。根据“The little boy didn’t stop crying...his mother bought him a toy.”可知，此处指直到妈妈给他买玩具小男孩才停止哭泣，固定搭配not...until...“直到……才……”符合题意。故选A。 50．Tony will begin to do his homework as soon as he ________ home. A．got B．gets C．is getting D．has got 【答案】B 【详解】句意：托尼一到家就会开始做家庭作业。 考查时间状语从句的时态。got一般过去时在；gets一般现在时第三人称单数形式；is getting现在进行时；has got现在完成时。根据“Tony will begin to do his homework as soon as he ... home.”，“as soon as” 引导的时间状语从句中，若主句为一般将来时，从句需用一般现在时表示将来动作。故选B。 51．—Passengers had better not use their smart phone ________ they are crossing the street. —Sorry, I won’t do it any more. A．unless B．before C．while D．after 【答案】C 【详解】句意：——乘客过马路时最好不要使用智能手机。——抱歉，我再也不会这样做了。 考查连词辨析。unless除非；before在……之前；while当……时；after在……之后。根据“…they are crossing the street.”可知，此处指正在过马路的过程中，强调动作同时进行，应用while引导时间状语从句。故选C。 52．We may fail from time to time, but we can learn from failure, correct our mistakes and try again ________ we achieve our goals. A．though B．after C．while D．until 【答案】D 【详解】句意：我们可能会一次又一次的失败，但我们可以从失败中学习，纠正我们的错误，再试一次，直到我们达到目标。 考查连词辨析。though尽管；after在……之后；while当……时；until直到。根据“try again…we achieve our goals”可知，我们应坚持尝试直到达成目标。故选D。 53．We met a nice and friendly neighbor ________ we lived in Shanghai. A．if B．although C．since D．when 【答案】D 【详解】句意：我们住在上海时遇到了一位友好的邻居。 考查连词。if如果；although尽管；since自从；when当……时。根据“We met a nice and friendly neighbor…we lived in Shanghai.”的语境可知，说明“遇到邻居”发生在 “住在上海”的期间，when符合。故选D。 54．Love your parents ________ they are alive. Don’t wait until it is too late. A．unless B．although C．until D．while 【答案】D 【详解】句意：父母在世时要爱他们。不要等到为时已晚。 考查连词的辨析。unless除非；although尽管；until直到……为止；while当……时。根据“Love your parents…they are alive.”可知，本句为时间状语从句，表示“当父母还活着的时候”，需用连词while。故选D。 55．I didn’t understand my teacher’s great love ________ I became a teacher myself. A．if B．until C．since D．because 【答案】B 【详解】句意：直到我自己成为了一名老师，我才理解老师深沉的爱。 考查从属连词辨析。if如果；until直到……才（常用于否定句中构成“not...until...”结构）；since自从；because因为。根据“I didn’t understand...I became a teacher”可知，直到成为老师，才理解老师深沉的爱，not...until...符合语境。故选B。 56．I’m going to do some research into traditional music for my report ________ I write on it. A．though B．before C．as if D．unless 【答案】B 【详解】句意：在撰写报告之前，我将进行一些关于传统音乐的研究。    考查连词辨析。though尽管；before在……之前；as if好像；unless除非。根据语境可知，“做研究”应发生在“撰写报告”之前，强调时间上的先后关系。before符合句意。故选B。 57．We can learn to take turns, share and solve problems ________ we join teams working together. A．or B．but C．when D．whether 【答案】C 【详解】句意：当我们加入团队合作时，我们可以学会轮流、分享和解决问题。 考查连词辨析。or或者；but但是；when在……时候；whether是否。根据“we join teams working together”可知，此处是指在加入团队合作的过程中能学会各项技能，应用when引导时间状语从句。故选C。 58．You will never truly understand your parents’ great love ______ you grow up. A．if B．until C．when D．while 【答案】B 【详解】句意：直到你长大，你才会真正理解父母的伟大之爱。 考查连词辨析。if如果；until直到……才；when当……时；while当……期间。根据“never truly understand”可知，此处表示“直到某个时间才理解”，用until符合not...until结构。故选B。 59．________ education in a country develops, the country will develop, and strong education makes a strong nation. A．Although B．Before C．Unless D．When 【答案】D 【详解】句意：当一个国家的教育发展时，国家也会发展，强大的教育造就强大的国家。 考查连词辨析。Although尽管；Before在……之前；Unless除非；When当……时。根据“...education in a country develops, the country will develop, and strong education makes a strong nation.”可知，此处是when引导的时间状语从句，当教育发展时，国家就会发展，故选D。 60．To avoid making mistakes in the exam, we should be more careful ________ we are answering the questions. A．while B．unless C．as soon as D．after 【答案】A 【详解】句意：为了避免考试中出错，我们在回答问题时应该更加认真。 考查连词辨析。while当；unless除非；as soon as一……就；after在……之后。根据“we are answering the questions.”可知是回答问题的时候要认真，用while引导时间状语从句。故选A。 61．Read the instructions carefully before you ________ the machine. A．use B．are using C．used D．have used 【答案】A 【详解】句意：使用机器前请仔细阅读使用说明。 考查时态。根据“Read the instructions carefully before you”可知，主句是祈使句，空处位于before引导的时间状语从句中，应用一般现在时，主语是you，use符合句意，故选A。 62．To reduce waste, we should turn off the tap ________ brushing teeth. A．before B．without C．while D．for 【答案】C 【详解】句意：为了减少浪费，我们应该在刷牙的时候关掉水龙头。 考查while引导的时间状语从句。before在……之前；without没有；while当……时候，强调主从句动作同时进行；for为了，持续。根据语境可知，这里是说在刷牙这个动作进行的同时关掉水龙头，强调两个动作同时发生，while符合语境。故选C。 63．— Time to go home now, Lucy. — Wait a moment. I can’t go home ________ I finish cleaning the classroom. A．since B．when C．until D．after 【答案】C 【详解】句意：——露西，该回家了。——等一下。直到我打扫完教室，我才能回家。 考查连词辨析。since自从；when当……时候；until直到； after在……之后。根据“I can’t go home…I finish cleaning the classroom.”可知，not…until…“直到……才”，固定用法。故选C。 64．—Jack, remember ______ off the lights when ______ your bedroom. —OK, I won’t forget, Mom. A．turning; leaving B．to turn; leaving C．to turn; leave D．turning; left 【答案】B 【详解】句意：——杰克，记得离开卧室时把灯关掉。——好吧，我不会忘记的，妈妈。 考查非谓语动词。remember to do sth.记得去做某事（未做）；remember doing sth.记得做过某事（已做）。第一个空，此处妈妈提醒Jack关灯，还未发生，故用不定式 to turn。第二个空，是省略结构，当主句和从句主语一致时，可省略主语并用现在分词，此处用leaving表示“离开卧室时”。故选B。 65．Visitors didn’t realize the beauty of Suqian ______ they came here. A．if B．until C．because D．after 【答案】B 【详解】句意：游客们直到来到这里才意识到宿迁的美丽。 考查连词辨析。if如果；until直到……才；because因为；after在……之后。根据“Visitors didn’t realize the beauty of Suqian…they came here.”可知，游客们直到来到这里才意识到宿迁的美丽，not…until…“直到……才……”，固定搭配。故选B。 66．— Jack, have you done the survey? — Not yet. I am in New York now. I’ll start it ________ I come back. A．whenever B．as soon as C．before D．after 【答案】B 【详解】句意：——杰克，你做过调查了吗？——还没有。我现在在纽约。我一回来，就开始。 考查从属连词辨析。whenever无论何时；as soon as一……就……；before在……之前；after在……之后。根据“I’ll start it as soon as I come back”可知，此处表示一回来就会开始做调查，故用as soon as。故选B。 67．He didn’t go to bed _________ his father came back home. A．because B．although C．until D．if 【答案】C 【详解】句意：直到他父亲回家他才上床睡觉。 考查状语从句。because因为；although虽然；until直到；if如果。根据“He didn’t go to bed”可知，此处表示直到他父亲回家他才上床睡觉。not … until表示“直到……才……”，引导时间状语从句。故选C。 68．—We have been friends since we ________ in the same neighborhood. —How time flies! A．have lived B．lived C．live D．will live 【答案】B 【详解】句意：——自从我们住在同一个街区以来，我们一直是朋友。 ——时间过得真快！ 考查动词时态。根据“We have been friends since we ... in the same neighborhood.”可知，“since”引导的时间状语从句，主句使用现在完成时，从句应使用一般过去时。故选B。 69．________ I fall ill, my mother always makes warm chicken soup. A．And B．When C．But D．So 【答案】B 【详解】句意：当我生病时，我妈妈总是做温暖的鸡汤。 考查连词辨析。And和，表并列；When当……时候，引导时间状语从句；But但是，表转折；So所以，表结果。根据语境可知，此处是在描述“当我生病时”这个时间点，妈妈会做鸡汤，所以应该用When引导时间状语从句。故选B。 70．—When will you go to see your grandpa? —I’ll see him ________ I get off the plane. He is waiting for me at the airport. A．as soon as B．as long as C．as far as D．as easily as 【答案】A 【详解】句意：——你将什么时间见到你的祖父？——我一下飞机就将见到他。他在机场等着我。 考查连词辨析。as soon as一……就，引导时间状语从句；as long as只要，引导条件状语从句；as far as就……而言，引导强调程度或范围的从句；as easily as像……一样简单，强调程度上的相同。根据“When will you go to see your grandpa?”可知，此处表示时间见到祖父的时间，所以用as soon as引导时间状语从句，故选A。 71．We’d better take action to solve a problem ______ it gets worse. A．before B．after C．until D．since 【答案】A 【详解】句意：我们最好在问题变得更糟之前采取行动解决它。 考查连词辨析。before在……之前；after在……之后；until直到；since自从。根据句意可知，采取行动要在变得糟糕之前，before符合题意。故选A。 72．—Lily took care of me when I broke my leg. She is a true friend. —I agree. As the saying goes, “A friend is never known ________ a man has need.” A．as B．till C．since D．though 【答案】B 【详解】句意：——莉莉在我摔断腿时照顾了我。她是一个真正的朋友。——我同意。正如俗话所说，“患难见真情。” 考查连词辨析。as因为；till直到；since自从；though尽管。根据“A friend is never known...a man has need.”可知，此处指的是直到一个人需要时，朋友才被知晓，也就是“患难见真情”，故选B。 73．—How long is it since he ________ his hometown? —He ________ for nearly 10 years. A．left; left B．has left; has left C．has left; has been away D．left; has been away 【答案】D 【详解】句意：——他离开家乡多久了？——他离开近10年了。 考查动词时态。第一空：“since”引导时间状语从句时，主句用现在完成时，从句用一般过去时，故填left；第二空：“for nearly 10 years”表示持续的时间段，需用现在完成时的延续性动词结构，has been away符合语境，而“has left”是瞬间动词不能接时间段。故选D。 74．The wind power of our country develops more quickly ________ we push for green energy. A．though B．before C．as D．until 【答案】C 【详解】句意：随着我们推动绿色能源发展，我国的风力发电发展得更快了。 考查连词辨析。though虽然；before在……之前；as随着；until直到……为止。根据“The wind power of our country develops more quickly...we push for green energy.”可知，as符合语境，引导时间状语从句，表示“随着我们推动绿色能源发展，我国的风力发电发展得更快了”。故选C。 18 / 18 学科网（北京）股份有限公司 $$