Unit 4 Grammar 时间状语从句 2024-2025学年牛津译林版英语九年级上册

牛津译林版初中英语九上Unit4 Grammar 时间状语从句 时间状语从句是指在复合句中充当时间状语的句子。 1. before、after、when和while引导的时间状语从句 before 意为“在……之前”,表示主句动作发生在从句动作之前。 Close the window before you leave the room. 你离开房间之前要把窗户关上。 after 意为“在……之后”,表示主句动作发生在从句动作之后。 I went to school after I finished my breakfast. 我吃完早餐后去上学。 when 意为“当……时”,表示主句动作发生的特定时间,两个动作可以是同时发生,也可以是先后发生;从句的谓语动词可以是延续性的也可以是非延续性的。 When I got home, Mum was cooking dinner. 当我到家时,妈妈正在做晚饭。 It began to rain when I was waiting for the bus. 当我在等公交车的时候,天下起了雨。 while 意为“在……期间;当……时”,表示主句动作发生在从句动作进行的过程中,也可以表示两个动作同时发生;从句的谓语动词应是延续性的。 While she was listening to the radio, she fell asleep. 她在听收音机的时候睡着了。 While my sister was sweeping the floor, I was washing the dishes. 我姐姐扫地时,我在洗碗。 【拓展】 上述连词在引导时间状语从句,且主句和从句的主语一致时,通常可以省略从句中的主语,构成“when/while/before/after+v.-ing”结构。例如: Before coming into the room, Peter knocked the door. 进房间之前,彼得敲了门。 2. since、till和until引导的时间状语从句 since 意为“自从……以来”。从句常用一般过去时,主句多用现在完成时。 Lily has lived in Nanjing since she was born. 莉莉自出生以来一直住在南京。 till 意为“到……为止”,表示动作或状态一直持续到某一时刻,通常可与until互换。但till不可以放在句首。 Read this article till/until you can recite it. 读这篇文章直到你能够背诵。 until 意为“到……为止”,表示动作或状态一直持续到某一时刻。until可以放在句首或句中。 Until you told us we knew nothing about it. 在你告诉我们之前,我们对此一无所知。 【拓展】 (1)since还可作介词,意为“从……以来”,后常接表示时间的单词或短语,句子的时态常用现在完成时;until也可用作介词,意为“直到……为止”,后接表示时间的名词或短语。例如: She has been here since seven o’clock this morning. 她从今天早上七点钟起就一直在这儿。 Don’t give up until the last minute. 不到最后一刻不要放弃。 (2)till/until引导时间状语从句时,如果主句中的谓语动词是非延续性动词,必须用否定形式,即“not...until/till”结构,意为“直到……才”。例如: I didn’t go to bed until/till I finished my homework. 直到做完家庭作业,我才上床睡觉。 3. as soon as和whenever引导的时间状语从句 (1) as soon as意为“一……就……”,强调主句的动作紧跟着从句的动作发生。如果主句用一般将来时,从句常用一般现在时。例如: I will call you as soon as I get to Shanghai. 我一到上海就给你打电话。 (2)whenever意为“每当;任何时候”,相当于every time。例如: You can ask for help whenever/every time you need it. 你如果需要帮助,随时可以提出来。 4. 在含时间状语从句的复合句中,主从句的时态应遵循的原则 (1) 当主句是一般将来时时,从句要用一般现在时。例如: Amy will wait here until her father comes back. 埃米会在这里等到她父亲回来。 (2) 当主句的谓语含有may、can、must等情态动词时,从句要用一般现在时。例如: When we see the traffic lights turn red, we must stop. 当我们看见交通灯变红时,我们必须停下来。 (3)当主句的谓语是want、hope、wish等动词时,从句要用一般现在时。例如: He wants to work in Beijing when he finishes college. 他大学毕业后想到北京工作。 (3) 当主句是祈使句时,从句要用一般现在时。例如: Don’t cross the street when the traffic lights are red. 当交通灯呈红色时,不要过马路。 (4) 当主句是一般过去时时,从句也要用一般过去时。 I started to learn English when I was young. 我小时候就开始学英语。 基础达标 一、用括号内所给词的正确形式填空。 1.Before _(leave) home, make sure you pack everything in your bag. 2.John will do some cleaning as soon as he _(arrive) at his office. 3.I will discuss the plan with you when you _(be) free. 4.While _(play) the game, everyone must keep their eyes closed. 5.Before Lisa went to bed, she _(listen) to English songs for a while. 6.Mr. Black goes _(jog) in the park near his home every morning. 7.I hope it won’t be long before China _(host)the World Cup. 二、根据句意,从方框中选择恰当的连词填空。 after when since as soon as until while whenever 1.Jane was doing homework _ suddenly all the lights went out. 2._ I am in trouble, my classmates will help me out. 3.—Do you enjoy playing basketball? —Yes. I often go to play it _ school is over. 4.—Where did Linda go yesterday afternoon? —She went to the bookstore _ she had lunch at home. 5.Don’t leave the room _ you are told to. 6.—How long have you known about the story of Lei Feng? —_ I was six. 7.It’s 9:30 a.m. My mother is watering the flowers in the garden _ my father is reading a magazine in the study. 三、单项选择。 1.Kobe won five NBA championships during his basketball _.( ) A.player B.career C.coach 2.We will have a football game _ Class 6 this afternoon.( ) A.to B.under C.against 3._ handing in your homework, you should check it carefully.( ) A.Before B.After C.Until 4.My parents won’t let me go out unless I promise to be back _ 10:00 tonight.( ) A.till B.as C.before 5.I _ my classmates since we graduated from high school.( ) A.didn’t see B.don’t see C.haven’t seen 6.—Can you come to Nanjing this summer? —OK. I will leave for Nanjing _ the summer holiday _.( ) A.whether; starts B.as soon as; starts C.if; will start 四、按要求完成句子,每空一词。 1.The celebration lasted until midnight.(对画线部分提问) _ _ _ the celebration _? 2.After the boy got home, he began to have supper at once.(改为同义句) _ _ _ the boy got home, he began to have supper. 3.Jim has been in the reading club since last term. (对画线部分提问) _ _ _ Jim _ in the reading club? 4.Don’t play with your mobile phone while you are crossing the road. (改为同义句) Don’t play with your mobile phone _ _ the road. 5.The parents took a walk in the school. Then they watched a play by the students.(合并为一句) _ _ a play by the students, the parents took a walk in the school. 参考答案: 一、 1.leaving 2.arrives 3.are 4.playing 5.listened 6. jogging 7. hosts 二、 1.when 2. Whenever 3. as soon as 4. after 5. until 6. Since 7. while 三、 B C A C C B 四、 1.How long did; last 2.As soon as 3.How long has; been 4.while crossing 5.Before watching 学科网(北京)股份有限公司 $$