Unit 1 Spring is coming! 时间状语从句（单元核心语法精练）英语新教材冀教版八年级下册

Unit 1 Spring is coming! 核心语法精练（时间状语从句） 目录 A 考点概览·知识回顾 1 B 考点夯基·专项突破 3 一、单项选择 3 二、完成句子 10 C 综合攻坚·能力跃升 12 题型一 语法填空 12 题型二 阅读理解 15 1． 定义： 时间状语从句是在复合句中充当状语，用于表示主句动作发生的时间的从句。 简单来说，它描述了一个动作发生的时间背景，通过特定的引导词（如 when、while、as、before、after、since、until 等）将这个时间信息与主句的动作联系起来。 例如：“When I was a child, I often played in the park.” （当我还是个孩子的时候，我经常在公园玩。）在这个句子中，“When I was a child”就是一个时间状语从句，它说明了主句“ I often played in the park”这个动作发生的时间。 2． 引导词 引导词的选择：如 when、while、as、before、after、since、until 等的正确使用及区分。 1.as soon as As soon as he arrives, I'll call you.他一到，我就给你打电话。【主将从现】 （as soon as 侧重时间或动作先后衔接紧，而once侧重条件，表示“一旦...”） As soon as I saw you, I liked you.=I liked you as soon as I saw you . 一见到你,我就喜欢上了你。 2. when, while, as引导时间状语从句 1) when的用法 when既可指时间点，也可指时间段（即：从句动词可以是短暂的也可是延续的）；主从句动作可同时也可先后发生。 I was thin when I was a child. 当我是个孩子的时候,我很瘦。 It was raining when I arrived.我到达时，天正在下雨。 When I saw you at my age of five, I liked you.五岁时见到你,就喜欢上了你。 你不在的时候他非常想念你 He does miss you when you are not here. 2）while用法 while只能指一段时间，从句中的动词必须是延续性动词。强调某一段时间内发生主句动作，相当于during the time that.... My mother was cooking while I was doing my homework.当我在做作业时，妈妈在做饭。 I am safe while I am here.我在这儿的时候，我很安全。 注意 while除引导时间状语从句外，还引导对比句，作“然而”讲；并可在句首引出让步状语从句作“虽然···但”讲。 I like watching TV, while he likes reading.我喜欢看电视，而他喜欢读书。 While he has his own car, he often uses mine.尽管他自己有车，他却常用我的。 3) as的用法 ① as引导时间状语从句时常可和when换用，但较强调同时发生，多指短暂动作。 As I left the house, I forgot the key.我离家时，忘了带钥匙。 ② as还可说明两种正在发展或变化的情况，“随着...”的意思，表时间的推移。如： As I get older, I get more optimistic.随着年龄的增长，我变得更加乐观。 3. until和till ①主句的谓语动词是延续性动词时,主句用肯定形式,表示这一动作或状态一直延续到until/till所表示的时间为止。 I’ll wait for you till you come to see me.我会一直等到你来看我。 ②主句的谓语动词是非延续性动词时,用否定形式表示主句的动作直到until所表示的时间才发生。构成句式not until,有时不用not,而用其他如never,nothing等表否定意义的词。 I didn’t go to bed until I finished my homework.我直到完成作业才去睡觉。 一、单项选择 1．—What happened to the boy? —He hit an old man ________ he was cycling to cross the road. A．if B．while C．whether D．but 【答案】B 【详解】句意：——那个男孩发生了什么？——他在骑车过马路时撞到了一位老人。 考查连词辨析。if如果；while当……时；whether是否；but但是。根据“He hit an old man...he was cycling to cross the road.”可知，空白处需填入表示时间的连词，连接“撞到老人”和“骑车过马路”两个同时发生的动作，强调时间背景。故选B。 2．It’s five in the afternoon. They are having a tea party ________ we are playing chess. A．before B．after C．when D．while 【答案】D 【详解】句意：现在是下午五点。他们正在举行茶话会，与此同时我们在下棋。 考查连词辨析。before在……之前；after在……之后”；when当……时（可接短暂性或延续性动作）；while当……时（用于连接同时发生的延续性动作）。根据句子中“are having a tea party”和“are playing chess”均为现在进行时（延续性动作），表示两个动作同时发生，应用while连接。故选D。 3．—Jack, remember ________ off the lights when ________ home. —OK. I won’t forget. A．turning; leaving B．to turn; leaving C．to turn; leave D．turning; left 【答案】B 【详解】句意：——杰克，记得离开家时关灯。——好的，我不会忘记的。 考查非谓语动词及状语从句的省略。remember to do sth.记得要做某事（未做）；remember doing sth.记得做过某事（已做）。根据句意，是提醒关灯，动作尚未发生，应用to turn。when引导时间状语从句，当从句主语与主句主语一致且谓语包含be动词时，可省略主语和be动词，此处完整形式为when you are leaving home，省略后为when leaving home。故选B。 4．Mr Green was talking on the phone ________ I arrived at his office. A．while B．when C．as soon as D．before 【答案】B 【详解】句意：当我到达他的办公室时，格林先生正在打电话。 考查连词辨析。while当，后加延续性动词；when当；as soon as一……就；before在……之前。根据“Mr Green was talking on the phone...I arrived at his office”可知是当到达办公室时，且arrive是非延续性动词，用when引导时间状语从句。故选B。 5．I was walking in the park ________ suddenly the storm started. A．when B．while C．before D．if 【答案】A 【详解】句意：我正在公园散步，突然暴风雨开始了。 考查连词辨析。when当……时（可接短暂性动词）；while当……时（接延续性动词）；before在……之前；if如果。when在此结构中表示“当……时（突然发生另一动作）”，常用于“was/were doing... when...”句型，强调主句动作进行时另一动作突然发生。while引导的从句需用延续性动词，而“suddenly the storm started”为瞬间动作；before（在……之前）、if（如果）均不符合语境。故选A。 6．Those boys were playing on the playground ________ it began to rain. A．while B．when C．after D．until 【答案】B 【详解】句意：那些男孩正在操场上玩，这时开始下雨了。 考查连词辨析。while当……的时候，强调动作同时进行，后接持续性动作；when当……的时候，可接瞬间动作；after在……之后；until直到。主句“were playing”是过去进行时，表示持续动作，从句“began to rain”是瞬间动词，表示下雨开始的那一刻，应用when引导时间状语从句，表示“当下雨发生时，男孩子们正在玩”。故选B。 7．While he ________ the piano, his mother came back. A．plays B．played C．is playing D．was playing 【答案】D 【详解】句意：他正在弹钢琴时，他的妈妈回来了。 考查谓语动词时态。句子是while引导的时间状语从句，主句时态为一般过去时，从句时态需用过去进行时，结构为was+现在分词。故选D。 8．Jenny and Jane were talking in the living room ________ I was listening to music. A．while B．until C．if 【答案】A 【详解】句意：——我在听音乐的时候，珍妮和简正在客厅里聊天。 考查连词辨析。while当……时；until直到；if如果。“were talking”和“was listening”两个动作同时进行，需用while引导时间状语从句。故选A。 9．My mother was cooking in the kitchen ________ my father was cleaning the living room. A．because B．after C．before D．while 【答案】D 【详解】句意：我妈妈在厨房做饭的时候，我爸爸在打扫客厅。 考查连词辨析。because因为；after在……之后；before在……之前；while当……时。根据“was cooking”和“was cleaning”可知，此处表示两个同时发生的动作，需用while引导此时间状语从句。故选D。 10．She learned to ride a bike ________ she was on vacation. A．so B．but C．and D．while 【答案】D 【详解】句意：她在度假的时候学会了骑自行车。 考查连词辨析。so所以，表示因果关系；but但是，表示转折关系；and和，表示并列关系；while当……的时候，表示时间关系。根据语境可知，此处是在描述她在度假这个时间学会了骑自行车，所以应该用while。故选D。 11．Maria ________ her kite while Michael played on his skateboard. A．flew B．flies C．is flying 【答案】A 【详解】句意：Maria在放风筝，而Michael在玩滑板。 考查动词时态。此处是while引导的时间状语从句，描述的是过去发生的动作，从句用一般过去时，主句也应用过去的时态，选项A符合。故选A。 12．________ Helen’s knowledge and vocabulary increased, she asked more and more questions. A．Unless B．While C．As D．Before 【答案】C 【详解】句意：随着海伦的知识和词汇量增长，她问的问题越来越多。 考查连词辨析。Unless除非；While当……时（强调同时性）；As随着（表伴随或渐进）；Before在……之前。根据“Helen’s knowledge and vocabulary increased, she asked more and more questions.”可知，前后分句为伴随关系，强调知识增长与提问增加的同步性，故选C。 13．________ time went on, the students became more confident in speaking English. A．When B．While C．As D．Because 【答案】C 【详解】句意：随着时间的推移，学生们在说英语方面变得更加自信了。 考查as引导的时间状语从句。When什么时候；While当……时；As随着；Because因为。根据“the students became more confident in speaking English.”可知，主句是渐进变化的结果，所以应用as引导时间状语从句，表示随着时间的推移。故选C。 14．________ the years go by, you will get to know it. A．As B．While C．Since D．Until 【答案】A 【详解】句意：随着岁月流逝，你会逐渐明白的。 考查连词辨析。as随着；while当……时候；since自从；until直到。根据“the years go by”可知，应表达“随着岁月的流逝”，应用as。故选A。 15．You should pay attention to the traffic lights ________ you cross the road. A．until B．as C．but D．so 【答案】B 【详解】句意：过马路时你应该注意交通灯。 考查连词辨析。 until直到；as当……时；but但是；so所以。“过马路”和“注意交通灯”是同时发生的，用as引导时间状语从句。故选B。 16．________ the bad man was leaving, the police came and caught him. A．So B．If C．But D．As 【答案】D 【详解】句意：当这个坏人正要离开时，警察来了并抓住了他。 考查连词辨析。So因此；If如果；But但是；As当……时。根据“the bad man was leaving, the police came and caught him.”可知，此处描述这个坏人要离开时被警察抓住了，用as引导时间状语从句。故选D。 17．—Tom, did you stay up late watching the basketball game? —Yeah. I didn’t go to sleep ____________ my father came back home at midnight. A．since B．until C．unless D．after 【答案】B 【详解】句意：——汤姆，你熬夜看篮球赛了吗？——是的。直到半夜我父亲回家，我才睡觉。 考查连词辨析。since自从；until直到；unless除非；after在……以后。根据“I didn’t go to sleep…my father came back home at midnight.”可知，此处表示“直到某个时间点才发生某事”，需要填入一个表示“直到……才”的连词，“until”符合语境。故选B。 18．I knew nothing about it ________ you told me. A．until B．after C．when 【答案】A 【详解】句意：我对此一无所知，直到你告诉我。 考查连词辨析。until直到；after在……之后；when当……时。根据“I knew nothing about it”可知，句子强调在“你告诉我”之前不知道，之后才知道，所以用until引导时间状语从句。故选A。 19．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。 20．We need to take action to save every drop of water ________ it is too late. A．before B．as C．after D．until 【答案】A 【详解】句意：我们需要在为时已晚之前采取行动节省每一滴水。 考查连词词义辨析。before在……之前，强调时间先后；as当……时，因为，引导时间状语从句或原因状语从句；after在……之后，强调时间先后；until直到，引导时间状语从句。按常理，我们应该在为时已晚之前采取行动节省每一滴水。故选A。 二、完成句子 21．当你需要支持的时候，你的好朋友应该对你不离不弃。 Your good friend should . 【答案】stand by your side when you need support 【详解】根据句意可知，此处要表达“当你需要支持的时候，对你不离不弃”的意思，“stand by one’s side”是固定短语，意为“站在某人身边，支持某人”，在这里“one’s”应替换为“your”；“when you need support”表示“当你需要支持的时候”，作为时间状语从句。故填stand by your side when you need support。 22．凌晨三点左右风渐渐平息，他才终于得以入眠。 He finally when the wind was at around 3:00 a.m. 【答案】 fell asleep dying down 【详解】对照中英文可知，缺少“渐渐平息”和“入眠”。根据“when the wind was”可知，此句为when引导的时间状语从句，主句为一般过去时，谓语动词用过去式，从句为过去进行时，结构为was doing。“入眠”用动词短语fall asleep，位于主句，fall用过去式的fell作谓语；“渐渐平息”用动词短语die down，位于从句，die用现在分词形式的dying。故填fell；asleep；dying；down。 23．雷雨开始的时候你在哪里？ Where were you the thunderstorm ? 【答案】 when started/began 【详解】第一空需要连接时间状语从句的连词，表示“当…… 时候”用when； 第二空需要填表示“开始”的动词，主句使用过去时(were)，从句需保持时态一致，start/begin表示“开始”，过去式为started/began。故填when；started/began。 24．当她走过时，她向我打招呼。 She greeted me she . 【答案】 when passed by 【详解】根据所给句意可知，第一空表示“当……的时候”，应用连词when；第二空和第三空表示“经过”，应用短语pass by，根据“She greeted me”可知，此句用一般过去时。故填when；passed；by。 25．他在一家工厂全职工作期间，自学了三门外语。 He three foreign languages full-time in a factory. 【答案】 taught himself while working 【详解】根据中英文对照可知，此处缺少“自学”“在……期间”和“工作”。teach oneself“自学”，时态为一般过去时，teach的过去式是taught，主语是He，对应的反身代词是himself；while“在……期间”；work“工作”，由于从句主语与主句主语一致，均为“He”，且从句谓语“work”表示主动动作，所以省略从句主语，直接用现在分词working作状语。故填taught；himself；while；working。 26．昨天托尼爬树的时候，从上面掉了下来。 Tony the tree he was climbing it yesterday. 【答案】 fell off while 【详解】由“…he was climbing it yesterday”可知，描述的是当做某事时正在发生的事情，应用while引导时间状语从句，从句时态为过去进行时，主句应用一般过去时；掉落：fall off，固定短语。故填fell off；while。 27．你看电视的时候最好别吃东西。 You’d better not eat anything . 【答案】while watching TV/while you’re watching TV 【详解】根据中文提示可知，用while引导时间状语从句；看电视：watch TV；此处while引导从句时，用现在进行时态，主语用you，与主句主语一致，因此可省略主语+be动词。故填while watching TV/while you’re watching TV。 28．随着青少年的成长，他们的身体也变得越来越强壮。 teenagers , their bodies become stronger and stronger. 【答案】 As grow up 【详解】根据中英文对照可知，缺少的部分为“随着……成长”，“as”意为“随着”，在句中引导时间状语从句；“grow up”意为“成长”，动词短语，时态为一般现在时，主语为“teenagers”，故应用动词原形。故填As；grow；up。 29．正当你走在泰晤士河边时，伦敦眼就在你的右边。 the River Thames, London Eye is . 【答案】 As you walk along on your right 【详解】对比题干可知，as可以表示“当……时”；you“你”；walk along“沿着……走”；on your right表示“在你的右边”。故填As you walk along；on your right。 30．他直到下周三才会离开。 He leaving next Wednesday. 【答案】 isn’t until 【详解】根据中英文对照可知，此处缺“直到……才”，对应的英文结构是not...until。句中leaving是现在进行时表“将来，计划”，主语He对应的be动词是is，其否定形式为isn’t，故填isn’t；until。 题型一 语法填空 阅读下面短文，在空白处填入一个适当的单词或用括号内单词的正确形式填空。 Judy grew up in Hainan. She moved to Harbin last year. She has never 1 (experience) snow before. It was Sunday that day. In the afternoon, there was a strong wind and the 2 (cloud) were getting together in the sky. It seemed there would be 3 heavy snow. It began 4 (snow) at around seven o’clock. At 5 (one), it snowed lightly, and then it snowed very heavily. Judy felt very 6 (excite) when she saw the real snow. She could see snow beating against the windows. 7 ten o’clock, she went to bed, but she couldn’t sleep 8 midnight. She was thinking about the snow. “We 9 (stay) at home tomorrow,” she said to 10 (she). Suddenly, a strong wind blew and the windows 11 (open). It was cold. So she got up and closed them 12 (quick). The next morning, after Judy brushed her teeth, she found the snow still falling. But later the snow and wind died down (减弱). The snow was 13 (light) than Judy expected. So after breakfast, she went 14 school. She had much difficulty 15 (walk) in the snow. But it was so interesting. 【答案】 1．experienced 2．clouds 3．a 4．to snow 5．first 6．excited 7．At 8．until 9．will stay 10．herself 11．opened 12．quickly 13．lighter 14．to 15．walking 【导语】本文主要讲述了Judy从海南搬到哈尔滨后，第一次经历下雪的故事。文中描述了下雪前的天气变化、下雪的过程以及Judy对雪的感受和反应，包括她因雪无法入睡、第二天上学时在雪中行走的困难与乐趣。 1．句意：她以前从未经历过雪。根据文中“She has never…snow before.”及提示词可知，此处指的是她从未经历过雪，句子时态为现在完成时，其谓语结构：have/has+done。experience“经历”，其过去分词形式“experienced”符合语境。故填experienced。 2．句意：下午，刮起了大风，天空中乌云密布。根据文中“there was a strong wind and the…were getting together in the sky.”及提示词可知，此处指的是乌云密布，cloud“乌云”，空处应为其可数名词复数形式。故填clouds。 3．句意：似乎会有一场大雪。根据文中“ It seemed there would be…heavy snow.”可知，此处泛指一场大雪，“heavy”以辅音音素字母开头。故填a。 4．句意：大约七点钟开始下雪。根据文中“It began…at around seven o’clock.”及提示词可知，此处指的是开始下雪，begin to do sth“开始做某事”，固定短语。故填to snow。 5．句意：起初，雪下得很小，后来雪下得很大。根据文中“At…, it snowed lightly, and then it snowed very heavily.”及提示词可知，此处指的是起初，at first“起初”，固定短语。故填first。 6．句意：朱迪看到真正的雪时感到非常兴奋。根据文中“Judy felt very…when she saw the real snow.”及提示词可知，此处指的是朱迪感到兴奋，excite“使兴奋”，动词，空处应为其形容词形式“excited”，意为：兴奋的，作表语，符合语境。故填excited。 7．句意：十点钟的时候，她上床睡觉了，但是她直到午夜才能睡着。根据文中“…ten o’clock, she went to bed,”可知，此处指的是十点钟，at+具体时刻，固定用法，且句首首字母大写。故填At。 8．句意：十点钟的时候，她上床睡觉了，但是她直到午夜才能睡着。根据文中“but she couldn’t sleep…midnight.”可知，此处指的是直到午夜才能睡着。not…until…“不……直到……”，符合语境。故填until。 9．句意：“我们明天将待在家里，”她对自己说。根据文中“We…at home tomorrow,”及提示词可知，此处指的是我们将要待在家里，句子时态为一般将来时，其谓语部分结构：will do。故填will stay。 10．句意：“我们明天将呆在家里，”她对自己说。根据文中“she said to…”及提示词可知，此处指的是她对自己说，she“她”，人称代词，空处应为其反身代词。故填herself。 11．句意：突然，一阵强风吹来，窗户打开了。根据文中“Suddenly, a strong wind blew and the windows…”及提示词可知，此处指的是窗户打开了，句子时态为一般过去时，谓语动词应为其动词过去式。故填opened。 12．句意：所以她站起来，迅速关上它们。根据文中“So she got up and closed them…”及提示词可知，此处指的是快速地关上窗户，quick“快速的”，形容词，空处应为其副词形式“quickly”，修饰动词“closed”，符合语境。故填quickly。 13．句意：雪比朱迪预期的要小。根据文中“The snow was…than Judy expected.”及提示词可知，此处指的是雪比朱迪预期的要小，空处应为形容词比较级。故填lighter。 14．句意：所以早饭后，她去了学校。根据文中“So after breakfast, she went…school.”可知，此处指的是朱迪去了学校，went to school“上学”，符合语境。故填to。 15．句意：她在雪地里行走很困难。根据文中“She had much difficulty…in the snow.”及提示词可知，此处指的是行走很困难，have difficulty (in) doing sth“做某事有困难”，固定短语。故填walking。 根据短文内容和上下文的提示，在每个空格内填入一个恰当的词，要求所填的词意义准确，形式正确，使短文意思完整，行文连贯。 There are four seasons in a year in my hometown. They are spring, summer, autumn and winter. In spring, grass and trees turn green. The weather is neither too cold 1 too hot. The wind blows 2 (gentle). The flowers 3 (blossom) one by one. I can play on the 4 (swing) in the park and have a field trip with my classmates on 5 (sun) days. I like this season 6 (good). In summer, it is often very hot. I go swimming 7 (near) every day because it is cool in the water. It usually rains a lot 8 late July and early August. Sometimes it rains 9 (heavy). 10 it rains, I stay at home. I don’t like rainy days. In autumn, it’s fine. 11 (leaf) turn yellow. The sky is blue. The farmers are busy 12 their crops. I often go out with my friends to enjoy the 13 (please) of the harvest (丰收). In winter, the temperature drops 14 zero. It is often snowy. I need 15 (wear) my jacket and boots. I don’t like this season. Do you like it? 【答案】 1．nor 2．gently 3．blossom 4．swings 5．sunny 6．best 7．nearly 8．in 9．heavily 10．When 11．Leaves 12．with 13．pleasure 14．below 15．to wear 【导语】本文介绍了作者家乡一年中的四个季节，包括每个季节的天气、景色、活动及作者的喜好。 1．句意：天气既不太冷也不太热。根据“The weather is neither too cold…too hot.”可知，此处考查neither…nor…表示“既不……也不……”。故填nor。 2．句意：风轻柔地吹着。根据“The wind blows….”可知，此处应用副词修饰动词blows，gentle的副词形式为gently。故填gently。 3．句意：花儿一朵接一朵地盛开。根据“The flowers…one by one.”可知，主语为复数，时态为一般现在时，用动词原形blossom。故填blossom。 4．句意：我可以在公园的秋千上玩耍，在晴朗的日子里和同学们一起去郊游。根据“I can play on the…in the park”可知，此处应用名词复数swings表示泛指秋千。故填swings。 5．句意：我可以在公园的秋千上玩耍，在晴朗的日子里和同学们一起去郊游。根据“have a field trip with my classmates on…days”可知，此处用形容词sunny修饰名词days。故填sunny。 6．句意：我最喜欢这个季节。根据“I like this season….”可知，这里是like…best 表示“最喜欢”，用good的最高级best。故填best。 7．句意：我几乎每天都去游泳，因为水里很凉爽。根据“I go swimming…every day”可知，此处用副词nearly表示“几乎”，修饰every day。故填nearly。 8．句意：七月下旬到八月上旬通常雨水很多。根据“It usually rains a lot…late July and early August.”可知，在月份时间段前用介词in。故填in。 9．句意：有时雨下得很大。根据“Sometimes it rains…”可知，此处用副词heavily修饰动词rains。故填heavily。 10．句意：下雨时，我就待在家里。根据“…it rains, I stay at home.”可知，此处用when引导时间状语从句，表示“当……时”。故填When。 11．句意：树叶变黄了。根据“…turn yellow.”可知，此处用名词复数leaves作主语，表示泛指树叶。故填Leaves。 12．句意：农民们忙着收割庄稼。根据“The farmers are busy…their crops.”可知，这里考查be busy with sth表示“忙于某事”。故填with。 13．句意：我经常和朋友出去享受丰收的喜悦。根据“enjoy the…of the harvest.”可知，此处用名词pleasure表示“喜悦”，为不可数名词。故填pleasure。 14．句意：冬天，气温降到零度以下。根据“In winter, the temperature drops…zero.”可知，此处用介词below表示“在……以下”。故填below。 15．句意：我需要穿夹克和靴子。根据“I need…my jacket and boots.”可知，这里是need to do sth表示“需要做某事”，用不定式to wear。故填to wear。 题型二 阅读理解 Have you ever experienced hui nan tian, or lasting humid (潮湿的) weather? Hui nan tian is a special weather condition in southern China. It normally appears in spring when the temperature begins to rise, and the humidity quickly increases. Before it arrives, there are usually a few cold days, with a temperature below 12℃. As the cold air goes away, warmer air quickly comes, and the temperature rises, creating a lot of water vapor (水蒸气). Small water drops can be seen on windows and walls. For example, if the temperature is below 12℃ from March 7th to 9th but suddenly rises on March 10th, then hui nan tian will appear on March 10th. During hui nan tian, the humid weather makes it easy for bacteria (细菌) to grow. Food goes bad easily, clothes stay wet, and sofas can get moldy (发霉的). Things like televisions may break down when they get wet inside, which can be dangerous for people to turn them on. It can also make people feel tired and sick. Catching a cold is prevalent during this time, as the temperature changes quickly. Although the weather troubles people a lot, for nature, it can be helpful. Thanks to the humid weather, plants can grow better with enough water and warmer air. To cut down the trouble caused by the lasting humid weather, scientists suggest that people in the south should close their windows in the morning and evening. At the same time, they should use an air conditioner to remove water from the air. It’s also useful to put newspapers on the floor, on tables, and at the door to take in water and wet air. 1．In which of the following conditions is hui nan tian most likely to appear on the 10th? A． B． C． D． 2．Which word has the same meaning as the underlined word “prevalent”? A．strange B．common C．important D．difficult 3．What is the best title for the passage? A．The Weather Changes B．The Warm Air Rises C．The Growth of Plants D．The Humid Weather 【答案】1．A 2．B 3．D 【导语】本文主要介绍了回南天的特征、影响和应对方法。 1．推理判断题。根据“For example, if the temperature is below 12℃ from March 7th to 9th but suddenly rises on March 10th, then hui nan tian will appear on March 10th.”可知，如果3月7日至9日气温低于12℃，但3月10日突然上升，那么3月10号就会出现回南天，选项A的图表符合语境。故选A。 2．词句猜测题。根据“It can also make people feel tired and sick. Catching a cold is prevalent during this time, as the temperature changes quickly.”及湿热天气易滋生细菌的特性可知，它也会让人感到疲倦和生病，由于气温变化很快，在此期间感冒很普遍，“prevalent”应表示“常见的”，与common意思相同。故选B。 3．最佳标题题。本文主要介绍了回南天的特征、影响和应对方法，选项D“潮湿的天气”作为标题最为合适。故选D。 No one knows what the weather is going to be like in the future, but many people think there are going to be some differences. According to the scientists, one difference is that in many places it’s going to be much hotter and it’s going to rain less. Some countries in Africa are going to become very dry all year round, and people can hardly find food and water. In Southern Europe and the United States, it’s going to be less easy for plants to grow. People there are also going to have problems finding food in the future. No one knows how much warmer it is going to be, but scientists say that change is going to be at least 2°C． They say that the ice in the Arctic (北极) is going to melt in the next years and a lot of the animals there are going to die. There is also going to be more water in the sea, so cities near the sea are going to disappear (消失). Another difference is that there are going to be more hurricanes and typhoons (飓风和台风). Scientists say they are going to happen all over the world, and many people are going to lose their homes. 1．Scientists think it will be ________ for people to find food and water in some countries in Africa. A．unlucky B．difficult C．common D．easy 2．The underlined word “melt” in the third paragraph means ________. A．becoming water B．becoming dirty C．turning white D．turning clean 3．We can know from the passage that ________. A．the plants will be less difficult to grow in the USA B．a lot of animals in the Arctic will still live happily there C．few people will lose their homes because of more typhoons D．people living in some cities near the sea will have to leave their homes 4．What’s the structure of this passage? A． B． C． D． 5．What’s the passage mainly about? A．A report from scientists. B．The differences in the future. C．The food and water in the future. D．The changes of the weather in the future. 【答案】1．B 2．A 3．D 4．C 5．D 【导语】本文介绍了未来天气可能发生的变化，包括气温升高、降水减少、北极冰川融化、极端天气增多等，以及这些变化对人类和环境的影响。 1．细节理解题。根据“Some countries in Africa are going to become very dry all year round, and people can hardly find food and water”可知，非洲一些国家的人们将很难找到食物和水，故选B。 2．词句猜测题。根据“the ice in the Arctic... is going to melt”可知，北极的冰会融化，即变成水，因此“melt”意为“变成水”，故选A。 3．推理判断题。根据“so cities near the sea are going to disappear”可知，沿海城市会消失，因此住在这些城市的人们将不得不离开家园，故选D。 4．篇章结构题。文章第①段总述未来天气会有变化，第②③段介绍天气变热温度上升所带来的影响，第④段介绍的是飓风和台风所带来的影响，故选C。 5．主旨大意题。文章围绕“未来天气的变化”展开，介绍了变化的具体表现及影响，故选D。 1 / 12 学科网（北京）股份有限公司 $ Unit 1 Spring is coming! 核心语法精练（时间状语从句） 目录 A 考点概览·知识回顾 1 B 考点夯基·专项突破 3 一、单项选择 3 二、完成句子 10 C 综合攻坚·能力跃升 12 题型一 语法填空 12 题型二 阅读理解 15 1． 定义： 时间状语从句是在复合句中充当状语，用于表示主句动作发生的时间的从句。 简单来说，它描述了一个动作发生的时间背景，通过特定的引导词（如 when、while、as、before、after、since、until 等）将这个时间信息与主句的动作联系起来。 例如：“When I was a child, I often played in the park.” （当我还是个孩子的时候，我经常在公园玩。）在这个句子中，“When I was a child”就是一个时间状语从句，它说明了主句“ I often played in the park”这个动作发生的时间。 2． 引导词 引导词的选择：如 when、while、as、before、after、since、until 等的正确使用及区分。 1.as soon as As soon as he arrives, I'll call you.他一到，我就给你打电话。【主将从现】 （as soon as 侧重时间或动作先后衔接紧，而once侧重条件，表示“一旦...”） As soon as I saw you, I liked you.=I liked you as soon as I saw you . 一见到你,我就喜欢上了你。 2. when, while, as引导时间状语从句 1) when的用法 when既可指时间点，也可指时间段（即：从句动词可以是短暂的也可是延续的）；主从句动作可同时也可先后发生。 I was thin when I was a child. 当我是个孩子的时候,我很瘦。 It was raining when I arrived.我到达时，天正在下雨。 When I saw you at my age of five, I liked you.五岁时见到你,就喜欢上了你。 你不在的时候他非常想念你 He does miss you when you are not here. 2）while用法 while只能指一段时间，从句中的动词必须是延续性动词。强调某一段时间内发生主句动作，相当于during the time that.... My mother was cooking while I was doing my homework.当我在做作业时，妈妈在做饭。 I am safe while I am here.我在这儿的时候，我很安全。 注意 while除引导时间状语从句外，还引导对比句，作“然而”讲；并可在句首引出让步状语从句作“虽然···但”讲。 I like watching TV, while he likes reading.我喜欢看电视，而他喜欢读书。 While he has his own car, he often uses mine.尽管他自己有车，他却常用我的。 3) as的用法 ① as引导时间状语从句时常可和when换用，但较强调同时发生，多指短暂动作。 As I left the house, I forgot the key.我离家时，忘了带钥匙。 ② as还可说明两种正在发展或变化的情况，“随着...”的意思，表时间的推移。如： As I get older, I get more optimistic.随着年龄的增长，我变得更加乐观。 3. until和till ①主句的谓语动词是延续性动词时,主句用肯定形式,表示这一动作或状态一直延续到until/till所表示的时间为止。 I’ll wait for you till you come to see me.我会一直等到你来看我。 ②主句的谓语动词是非延续性动词时,用否定形式表示主句的动作直到until所表示的时间才发生。构成句式not until,有时不用not,而用其他如never,nothing等表否定意义的词。 I didn’t go to bed until I finished my homework.我直到完成作业才去睡觉。 一、单项选择 1．—What happened to the boy? —He hit an old man ________ he was cycling to cross the road. A．if B．while C．whether D．but 2．It’s five in the afternoon. They are having a tea party ________ we are playing chess. A．before B．after C．when D．while 3．—Jack, remember ________ off the lights when ________ home. —OK. I won’t forget. A．turning; leaving B．to turn; leaving C．to turn; leave D．turning; left 4．Mr Green was talking on the phone ________ I arrived at his office. A．while B．when C．as soon as D．before 5．I was walking in the park ________ suddenly the storm started. A．when B．while C．before D．if 6．Those boys were playing on the playground ________ it began to rain. A．while B．when C．after D．until 7．While he ________ the piano, his mother came back. A．plays B．played C．is playing D．was playing 8．Jenny and Jane were talking in the living room ________ I was listening to music. A．while B．until C．if 9．My mother was cooking in the kitchen ________ my father was cleaning the living room. A．because B．after C．before D．while 10．She learned to ride a bike ________ she was on vacation. A．so B．but C．and D．while 11．Maria ________ her kite while Michael played on his skateboard. A．flew B．flies C．is flying 12．________ Helen’s knowledge and vocabulary increased, she asked more and more questions. A．Unless B．While C．As D．Before 13．________ time went on, the students became more confident in speaking English. A．When B．While C．As D．Because 14．________ the years go by, you will get to know it. A．As B．While C．Since D．Until 15．You should pay attention to the traffic lights ________ you cross the road. A．until B．as C．but D．so 16．________ the bad man was leaving, the police came and caught him. A．So B．If C．But D．As 17．—Tom, did you stay up late watching the basketball game? —Yeah. I didn’t go to sleep ____________ my father came back home at midnight. A．since B．until C．unless D．after 18．I knew nothing about it ________ you told me. A．until B．after C．when 19．The wind power of our country develops more quickly ________ we push for green energy. A．though B．before C．as D．until 20．We need to take action to save every drop of water ________ it is too late. A．before B．as C．after D．until 二、完成句子 21．当你需要支持的时候，你的好朋友应该对你不离不弃。 Your good friend should . 22．凌晨三点左右风渐渐平息，他才终于得以入眠。 He finally when the wind was at around 3:00 a.m. 23．雷雨开始的时候你在哪里？ Where were you the thunderstorm ? 24．当她走过时，她向我打招呼。 She greeted me she . 25．他在一家工厂全职工作期间，自学了三门外语。 He three foreign languages full-time in a factory. 26．昨天托尼爬树的时候，从上面掉了下来。 Tony the tree he was climbing it yesterday. 27．你看电视的时候最好别吃东西。 You’d better not eat anything . 28．随着青少年的成长，他们的身体也变得越来越强壮。 teenagers , their bodies become stronger and stronger. 29．正当你走在泰晤士河边时，伦敦眼就在你的右边。 the River Thames, London Eye is . 30．他直到下周三才会离开。 He leaving next Wednesday. 题型一 语法填空 阅读下面短文，在空白处填入一个适当的单词或用括号内单词的正确形式填空。 Judy grew up in Hainan. She moved to Harbin last year. She has never 1 (experience) snow before. It was Sunday that day. In the afternoon, there was a strong wind and the 2 (cloud) were getting together in the sky. It seemed there would be 3 heavy snow. It began 4 (snow) at around seven o’clock. At 5 (one), it snowed lightly, and then it snowed very heavily. Judy felt very 6 (excite) when she saw the real snow. She could see snow beating against the windows. 7 ten o’clock, she went to bed, but she couldn’t sleep 8 midnight. She was thinking about the snow. “We 9 (stay) at home tomorrow,” she said to 10 (she). Suddenly, a strong wind blew and the windows 11 (open). It was cold. So she got up and closed them 12 (quick). The next morning, after Judy brushed her teeth, she found the snow still falling. But later the snow and wind died down (减弱). The snow was 13 (light) than Judy expected. So after breakfast, she went 14 school. She had much difficulty 15 (walk) in the snow. But it was so interesting. 根据短文内容和上下文的提示，在每个空格内填入一个恰当的词，要求所填的词意义准确，形式正确，使短文意思完整，行文连贯。 There are four seasons in a year in my hometown. They are spring, summer, autumn and winter. In spring, grass and trees turn green. The weather is neither too cold 1 too hot. The wind blows 2 (gentle). The flowers 3 (blossom) one by one. I can play on the 4 (swing) in the park and have a field trip with my classmates on 5 (sun) days. I like this season 6 (good). In summer, it is often very hot. I go swimming 7 (near) every day because it is cool in the water. It usually rains a lot 8 late July and early August. Sometimes it rains 9 (heavy). 10 it rains, I stay at home. I don’t like rainy days. In autumn, it’s fine. 11 (leaf) turn yellow. The sky is blue. The farmers are busy 12 their crops. I often go out with my friends to enjoy the 13 (please) of the harvest (丰收). In winter, the temperature drops 14 zero. It is often snowy. I need 15 (wear) my jacket and boots. I don’t like this season. Do you like it? 题型二 阅读理解 Have you ever experienced hui nan tian, or lasting humid (潮湿的) weather? Hui nan tian is a special weather condition in southern China. It normally appears in spring when the temperature begins to rise, and the humidity quickly increases. Before it arrives, there are usually a few cold days, with a temperature below 12℃. As the cold air goes away, warmer air quickly comes, and the temperature rises, creating a lot of water vapor (水蒸气). Small water drops can be seen on windows and walls. For example, if the temperature is below 12℃ from March 7th to 9th but suddenly rises on March 10th, then hui nan tian will appear on March 10th. During hui nan tian, the humid weather makes it easy for bacteria (细菌) to grow. Food goes bad easily, clothes stay wet, and sofas can get moldy (发霉的). Things like televisions may break down when they get wet inside, which can be dangerous for people to turn them on. It can also make people feel tired and sick. Catching a cold is prevalent during this time, as the temperature changes quickly. Although the weather troubles people a lot, for nature, it can be helpful. Thanks to the humid weather, plants can grow better with enough water and warmer air. To cut down the trouble caused by the lasting humid weather, scientists suggest that people in the south should close their windows in the morning and evening. At the same time, they should use an air conditioner to remove water from the air. It’s also useful to put newspapers on the floor, on tables, and at the door to take in water and wet air. 1．In which of the following conditions is hui nan tian most likely to appear on the 10th? A． B． C． D． 2．Which word has the same meaning as the underlined word “prevalent”? A．strange B．common C．important D．difficult 3．What is the best title for the passage? A．The Weather Changes B．The Warm Air Rises C．The Growth of Plants D．The Humid Weather No one knows what the weather is going to be like in the future, but many people think there are going to be some differences. According to the scientists, one difference is that in many places it’s going to be much hotter and it’s going to rain less. Some countries in Africa are going to become very dry all year round, and people can hardly find food and water. In Southern Europe and the United States, it’s going to be less easy for plants to grow. People there are also going to have problems finding food in the future. No one knows how much warmer it is going to be, but scientists say that change is going to be at least 2°C． They say that the ice in the Arctic (北极) is going to melt in the next years and a lot of the animals there are going to die. There is also going to be more water in the sea, so cities near the sea are going to disappear (消失). Another difference is that there are going to be more hurricanes and typhoons (飓风和台风). Scientists say they are going to happen all over the world, and many people are going to lose their homes. 1．Scientists think it will be ________ for people to find food and water in some countries in Africa. A．unlucky B．difficult C．common D．easy 2．The underlined word “melt” in the third paragraph means ________. A．becoming water B．becoming dirty C．turning white D．turning clean 3．We can know from the passage that ________. A．the plants will be less difficult to grow in the USA B．a lot of animals in the Arctic will still live happily there C．few people will lose their homes because of more typhoons D．people living in some cities near the sea will have to leave their homes 4．What’s the structure of this passage? A． B． C． D． 5．What’s the passage mainly about? A．A report from scientists. B．The differences in the future. C．The food and water in the future. D．The changes of the weather in the future. 1 / 12 学科网（北京）股份有限公司 $