时间状语从句讲解和练习(答案)(可编辑修改word版)
2021年初中英语语法：时间状语从句解析和练习题(含答案)
2021年初中英语语法：时间状语从句解析和练习题(含答案)在句子中起时间状语作用的句子称为时间状语从句。
时间状语从句可以放在句首、句中和句尾。
引导时间状语从句的词有when、while、as、before、after、since、until/till、as soon as、once、each time、next time、the moment、immediately、instantly等。
（一）when引导的时间状语从句1）when意为“当......时”，引导时间状语从句，表示主句的动作和从句的动作同时或先后发生例句：Faith is the bird that feels the light when the dawn is still dark. 信念是黎明前的黑夜里能感受到光明的鸟儿。
例句：When I was wandering in the street, I met her. 我在街上徘徊的时候遇到了她。
2）when引导的时间状语从句中的动词可以用延续性的=动词，也可以用终止性动词例句：He was listening to the music when I went in. 当我进去的时候，他正在听音乐。
例句：I will visit my parents when I have time. 我有空时会去看望我的父母。
（二）while引导的时间状语从句While引导的时间状语从句，常译为“与......同时，在......期间”，while引导的从句常用延续性动词或表示状态的动词。
例句：They rushed in while we were discussing problems. 当我们正在讨论问题时，他们冲了进来。
例句：Make hay while the sun is shining. （谚）趁热打铁。
（三）as引导的时间状语从句As引导的时间状语从句，可以表达“正当，一边一边，随着”等意思。
时间状语从句(含练习及答案)
以when 引导的时间状语从句- When I got home, my son had finished his homework. (主句动作发生在从句之前)- When(当...时候, 主语+did) we arrived, it was raining.- When(正当...时候，主语+be+doing) I was playing the computer games, my mum came in. - He is always nervous when he speaks to strangers.- I usually walk to school when it rains.以while 引导的时间状语从句- While I was reading, my brother was playing with his toy cars. (主从句子动作同时发生)- While/When/As he was studying in the library, I saw him. (表示一段时间时，while/when/as 可替换)while引导的从句的谓语动词必须是持续性动作:I saw him while(x) I was getting off the bus.(x)I saw him when/as I was getting off the bus.以as 引导的时间状语从句- He will grow wiser as he grows older. 随着年龄的增长，他会聪明起来。
（随着，表示时间的推移，这时，不用when/while）- He entered the room as/when/while the meeting was going on. 正当开会的时候，他走进房间。
以before引导的时间状语从句- He had washed his hands before he had dinner. (主句动作先于从句动作)- Please clean the house before you move in.以after 引导的时间状语从句- She went on holiday after she had taken the examination. (从句动作先于主句)- You can watch TV after you finish your homework.以since 引导的时间状语从句- She has been in the house since she came to the city. (主句完成时态，从句过去时)- I have taught them English since last year.以as soon as引导的时间状语从句- I will write to you as soon as I get to America. 我一到美国就会给你写信。
大学英语词汇与语法练习7：状语从句专项练习题—答案（可编辑修改word版）
⼤学英语词汇与语法练习7：状语从句专项练习题—答案（可编辑修改word版）练习7：状语从句专项练习题I.Multiple Choice1.you return the dictionary to the library immediately, you will be fined.A.IfB. UntilC. ProvidedD. Unless答案：D解析：句意为“除⾮你马上把字典还回图书馆，否则你会被罚款。
”unless 相当于if …not，换⾔之，“如果你不马上把字典还回图书馆，你就要被罚款。
”2.difficulties they may come across, they will help one another to get over them.A.HoweverB. WhateverC. WhicheverD. Since答案：B解析：句意为“不论他们会遇到什么困难，他们会相互帮助去克服的。
”whatever——不论什么，⽤来指代尚未发⽣的未知的事物。
⽐较，whichever——不论哪⼀个，⽤来指代已知多个事物中的任何⼀个。
3.little we may like it, old age comes to most of us.A.SoB. SinceC. HoweverD. Despite答案：C解析：句意为“不论我们多么不喜欢它，⽼年会降临到我们⼤部分⼈⾝上。
”However，副词，⽤来修饰形容词或副词，本句中修饰little (adv.)，表⽰喜欢的程度。
所给选项中despite 不引起从句。
4.he had knowledge of Spanish, he still attended the training course.A.Bur forB. So long asC. AlthoughD. In spite答案：C解析：句意为“尽管他了解西班⽛语知识，他仍然参加了培训课程。
英语时间状语从句讲解与练习(完整版)
英语时间状语从句讲解与练习英语时间状语从句讲解与练习when, while 和 as 引导时间状语从句的用法这三个词的意思很简单，都有“当……时候”的意思。
但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。
别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。
现根据大量的实例和个人的思考，做一点小结，供大家参考。
一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。
2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。
3. Were you writing when the teacher came in 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
5. He was on the point of leaving when someone knocked at the door. 他正要走，这时有人敲门。
6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。
7. I had hardly[scarcely] closed my eyes when someone knocked at the door. 我刚一闭上眼，就有人在敲门了。
根据以上的例句，我们可以总结出一点：when 从句的A事件，相当于另一个事件B发生的时间点。
也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。
高中时间状语从句及练习(含答案)
状语从句状语从句在句中作状语，修饰主句中的动词、形容词或副词等。
状语从句放在主句之前时，常用逗号分开;放在主句之后，一般不用逗号。
状语从句按其意义和作用可分为时间、原因、地点、条件、让步、目的、结果、方式、比较等9种。
1.时间状语从句时间状语从句表示主句动作发生的时间，主要由when，while，as ; before, after; till (until); once, by the time, as soon as, no sooner ... than和hardly ... when及名词词组the moment等引导。
1) when“在……的时候”; while “在……期间”; as “正当……的时候”when意为“在……的时候”，强调“特定时间”。
When spring came, he felt like a trip.When he was eating his breakfast, he heard the doorbell ring.说明：连词when在状语从句中还有如下几种含义：①表示突然发生的事，含义为“（正在……时）忽然”。
I was just coming along to see you when I ran into Wilson.I had been working a couple of months when I had a letter from Jane.②表示过早发生某事，意为“（还没……）就”。
此含义有时可用before代替。
I hadn’t been reading for half an hour when I heard steps outside.我刚读了不到半个小时就听到外面有脚步声。
I had been there little more than a week when I set to work in earnest.③表示“在……的情况下”，常可译为“虽然”，“既然”，“如果”。
语法讲解-时间状语从句的用法解析及练习
语法讲解时间状语从句的用法解析及练习状语从句在复合句中作状语，其位置较灵活，可以在主句之前、之后或中间(放在句首时状语从句后面常用逗号，放在句末时状语从句前面往往不用逗号)。
根据状语从句的含义，状语从句主要分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、方式状语从句、结果状语从句、条件状语从句、让步状语从句等八种。
掌握以上各种状语从句的关键在于把握其相应的引导词。
以下是对时间状语从句的基本用法进行小结，希望可以帮助到同学们有一更深的理解。
时间状语从句的引导词when, before, after, as, while, till/until, since，whenever时间状语从句的用法时间状语从句的引导词所表示的意思不尽相同，要注意把握不同的时间状语从句的引导词所表示的不同时间关系，以及它在具体句子中对应的对应时态、语态等问题。
1. when、as、while引导的时间状语从句分析：(1) when引导时间状语从句时表示“当……的时候”，when既可以指时间段也可指时间点，从句中既可用延续性动词又可用非延续性动词，且动作既可和主句的动作同时发生又可在主句的动作之前或之后发生。
注意体会如下例句：I’ll call you when I get there. 我一到那里就给你打电话。
// When the wind blows, all the doors rattle. 只要风一吹，这门就吱嘎作响。
// He stopped trying, when he might have succeeded next time. 他不再试了，其实他可能下一次就成功。
// When I came home my wife was cooking dinner. 我回家时，妻子在做晚饭。
如果when引导的时间状语从句的主语与主句主语相同，而从句的谓语又是be动词时，那么从句中的主语和be可以省略;当when引导的时间状语从句的主语与主句主语相同时，往往还可以用“when+分词”的形式替代该状语从句。
牛津上海版八年级上册as soon as引导的时间状语从句专项讲解及练习(有答案)
as soon as引导的时间状语从句1.as soon as的用法：“一……就”，用于引导时间状语从句，可以放在主句的前面或后面，所用的时态需注意以下两点：1）如果主句是一般将来时，从句用一般现在时代替一般将来时。
He will play football, as soon as he ___________（完成）his homework.他一做完作业就踢足球。
【答案】finishes2)紧接着发生的两个短动作，主从句都用一般过去时。
As soon as he came back, he _________ _________（打开）the TV.他一回来就看电视。
【答案】turned on2.as soon as 与when/ while/until的比较1）as soon as引导的从句表示从句的动作一发生，主句的动作随之发生。
常翻译为“一……就”。
_________________（一……就）my mother came back, my sister ran to her.我的妈妈一回来妹妹就跑向她。
【答案】As soon as2）when既可引导一个连续性动作也可引导一个短暂性动作。
常翻译为“当……时候”。
He was making a phone call _____________（当……时候）I met him yesterday.昨天我遇见他的时候他正在打电话。
【答案】when3）while引导的动作必须是持续性的。
常翻译为“当……时候”。
_____________(当……时候) my wife was reading the newspaper, I was watching TV.我妻子看报的时候我在看电视。
【答案】While4)until用于肯定句中表示动作的终点，常翻译为“直到……时”，用于否定句中，“not...until...”常翻译为“直到……才”。
Continue in this direction __________(直到）you see a sign.一直朝着这个方向走直到你看见指示牌。
(完整版)初中时间状语从句语法及练习(全)
什么是状语：句子中修饰动词、形容词等的句子成分叫状语，用来从地点、时间、原因、目的、结果、条件、让步、比较、方式和伴随状况等方面修饰说明谓语。
e.g. He speaks English very well（. 副词作状语）e.g. He is playing under the tree（. 介词短语作状语）e.g. I come specially to see you（. 不定式作状语）e.g. If I am not busy tomorrow,I will play football with you. （从句作状语）e.g. Having had a quarrel with his wife,he left home in a bad tempe（r. 分词作状语）状语从句：状语从句就是在复合句里起状语作用的从句，可以表示时间、地点、原因、目的、结果、让步、比较、方式、条件等。
引导状语从句的连词叫做从属连词。
状语从句的位置可以在句首，也可以在句末。
放在句首时，从句后面常用逗号与主句隔开；放在句末时，从句前面往往不用逗号。
If it ' s fine tomorrow, I lw gilo with you.I will go with you if it ' s fine tomorrow.状语从句分类：1、时间状语从句2、地点状语从句3、原因状语从句4、目的状语从句5、结果状语从句6、条件状语从句7、让步状语从句8、比较状语从句9、方式状语从句时间状语从句从属连词：when, while, as, before, after, till/until, since, whenever, as soon as（就）⋯⋯时态：主将从现，主情从现，主祈从现、When/while/as （当⋯时候）区别：主句动作与从句动作发生的时间（同时/之前/之后）；从句动词（延续性/瞬时性）1）When:when 引导时间状语从句时表示“当⋯⋯的时候”，when既可以指时间段也可指时间点，从句中既可用延续性动词又可用瞬间性动词，且动作既可和主句的动作同时发生又可在主句的动作之前或之后发生。
高中时间状语从句及练习(含解答)
高中时间状语从句及练习(含解答)状语从句是用来修饰主句中的动词、形容词或副词等的从句。
当状语从句放在主句之前时，通常需要用逗号分隔；而当放在主句之后时，则不需要逗号。
根据其意义和作用，状语从句可分为时间、原因、地点、条件、让步、目的、结果、方式和比较等九种类型。
1.时间状语从句时间状语从句用于表示主句动作发生的时间，通常由when、while、as、before、after、till (until)、once、by the time、as soon as、no sooner。
than和hardly。
when等引导词，以及名词词组XXX等构成。
其中，when表示“在……的时候”，强调“特定时间”。
例如：When spring came。
he felt like taking a trip.When he was eating his breakfast。
XXX.需要注意的是，连词when在状语从句中还有其他含义。
比如，它可以表示突然发生的事，含义为“（正在……时）忽然”；可以表示过早发生某事，意为“（还没……）就”；还可以表示“在……的情况下”，通常译为“虽然”、“既然”、“如果”等。
举个例子：I was just coming along to see you when I ran into Wilson.I hadn’t been reading for half an hour when I heard steps outside.She refuses help when (although) she has many friends.Why do you walk when (since) you have a car?How can I make them understand if they refuse to listen to me。
It's frustrating when you XXX。
(完整版)初中时间状语从句语法及练习(全)
状语从句什么是状：句子中修、形容等的句子成分叫状，用来从地点、、原因、目的、果、条件、步、比、方式和陪同情况等方面修明。
e.g. He speaks English very well（.副作状）e.g. He is playing under the tree（.介短作状）e.g. I come specially to see you（.不定式作状）e.g. If I am not busy tomorrow,I will play football with you.（从句作状）e.g. Having had a quarrel with his wife,he left home in a bad temper（.分作状）状从句：状从句就是在复合句里起状作用的从句，能够表示、地点、原因、目的、果、步、比、方式、条件等。
引状从句的叫做隶属。
状从句的位置能够在句首，也能够在句末。
放在句首，从句后边常用逗号与主句分开；放在句末，从句前面常常不用逗号。
If it ’ s fine tomorrow, I wilgo with you.I will go with you if it’ s fine tomorrow.状从句分：1、状从句2、地点状从句3、原因状从句4、目的状从句5、果状从句6、条件状从句7、步状从句8、比状从句9、方式状从句状从句隶属：when, while, as, before, after, till/until, since, whenever, as soon as（一⋯⋯就）⋯⋯：主将从，主情从，主祈从一、 When/while/as （当⋯候）区：主句作与从句作生的（同/以前 /此后）；从句（延性 /瞬性）1）When:when 引状从句表示“当⋯⋯ 的候”，when既能够指段也可指点，从句中既可用延性又可用瞬性，且作既可和主句的作同生又可在主句的作以前或此后生。
且when 引的状从句中一般用一般在表将来（主将从）。
英语时间状语从句讲解与练习(完整版)(精编文档).doc
【最新整理，下载后即可编辑】英语时间状语从句讲解与练习英语时间状语从句讲解与练习when, while 和as 引导时间状语从句的用法这三个词的意思很简单，都有“当……时候”的意思。
但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。
别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。
现根据大量的实例和个人的思考，做一点小结，供大家参考。
一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas.他小时候就常常试验一些新的设想。
2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。
3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
5. He was on the point of leaving when someone knocked at the door.他正要走，这时有人敲门。
6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。
7. I had hardly[scarcely] closed my eyes when someone knocked at the door.我刚一闭上眼，就有人在敲门了。
根据以上的例句，我们可以总结出一点：when 从句的A事件，相当于另一个事件B发生的时间点。
也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。
高中英语状语从句讲解以及练习
高中英语状语从句以及练习状语从句1. 定义：在复合句中由从句表示的状语称作状语从句，它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。
2. 考点：(1) 状语从句连接词的选用(2) 状语从句的时态3. 分类：（9种）时间状语从句，地点状语从句，原因状语从句，条件状语从句，让步状语从句，结果状语从句，目的状语从句，方式状语从句，比较状语从句4. 重点，难点，考点A．时间状语从句：（1）表示同时性，即主从句的谓语动作同时发生或几乎同时发生。
其连词有：when （当……的时候）, while（当……的时候）, as（当……的时候）, once（一旦……）as soon as（一……就……）, the time（当……的时刻）, the moment（当……的时刻）, by the time（到……时候为止）, next time(下次),the first time(第一次……的时候),the last time(上次……的时候)，immediately（一……就……）,instantly（一……就……）,directly（一……就……）以下关联词引起的句子中，前面常用过去完成时，后面用一般过去时hardly /scarcely…when…= no sooner…than…（一……就……）Strike while the iron is hot.趁热打铁。
While I am washing the floor, you can be cleaning the windows.我洗地板的时候，你可以擦窗户。
As / When I came home, I met an old schoolmate of mine.我回家的时候遇到了我的一位老同学。
I’ll r ing you up as soon as I get an answer from him.我一有他的答复就给你打电话。
Once you see him, you will never forget him. 你一旦见过他，就不会忘了他的。
英语时间状语从句讲解与练习(完整版)
英语时间状语从句讲解与练习英语时间状语从句讲解与练习when, while 和as 引导时间状语从句的用法这三个词的意思很简单，都有“当……时候”的意思。
但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。
别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。
现根据大量的实例和个人的思考，做一点小结，供大家参考。
一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas.他小时候就常常试验一些新的设想。
2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。
3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
5. He was on the point of leaving when someone knocked at the door.他正要走，这时有人敲门。
6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。
7. I had hardly[scarcely] closed my eyes when someone knocked at the door.我刚一闭上眼，就有人在敲门了。
根据以上的例句，我们可以总结出一点：when 从句的A 事件，相当于另一个事件B发生的时间点。
也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。
状语从句讲解及习题附答案
状语从句〔一〕状语从句概述〔二〕状语从句详解1. 时间状语从句2.地点状语从句3.条件状语从句4.原因状语从句5.目的状语从句6.结果状语从句7.让步状语从句8. 比拟状语从句9.方式状语从句练习一一. 单项填空1. _______ he’s old, he can still carry this heavy bag.A. ThoughB. SinceC. ForD. So2. ---Do you know if he _______ to play basketball with us"---I think he will e if he ______ free tomorrow.A. es; isB. es; will beC. will e; isD. will e; will be3. In the zoo if a child _____ into the water and can’t swim, the dolphins may e up ______ him.A. will fall; to helpB. falls; to helpC. will fall; helpD. falls; helping4. I don’t remember ________ he worked in that city when he was young.A. whatB. whichC. whereD. who5. We will stay at home if my aunt ________ to visit us tomorrow.A. esB. eC. will eD. is ing6. The police asked the children _______ cross the street ________ the traffic lights turned green.A. not; beforeB. don’t; whenC. not to; untilD. not; after7. I was late for class yesterday _______ there was something wrong with my bike.A. whenB. thatC. untilD. because8. I’ll go swimming with you if I ________ free tomor row.A. will beB. shall beC. amD. was9. In the e*am, the ________ you are, ______ the _______ mistakes you will make.A. careful; littleB. more careful; fewestC. more careful; fewerD. more careful; less10. You should finish your lessons _______ you go out to play.A. beforeB. afterC. whenD. while11. I hurried _____ I wouldn’t be late for class.A. sinceB. so thatC. as ifD. unless12. When you read the book, you’d better make a mark _______ you have any questions.A. whichB. thatC. whereD. though13. The teacher raised his voice _______ all the students could hear him.A. forB. so thatC. becauseD. in order14. He took off his coat _______ he felt hot.A. becauseB. asC. ifD. since15. It is ______ that we’d like to go out for a walk.A. a lovely dayB. too lovely a dayC. so lovely a dayD. such lovely a day16. Mary had ______ much work to do that she stayed at her office all day.A. suchB. soC. tooD. very17. _______ I felt very tired, I tried to finish the work.A. AlthoughB. BecauseC. AsD. As if18. ______ the day went on, the weather got worse.A. WithB. SinceC. WhileD. As19. ______ well you can drive, you must drive carefully.A. So long asB. In order thatC. No matter howD. The moment20. Write to me as soon as you ________ to Beijing.A. will getB. getC. gettingD. got二. 根据中文意思完成以下英语句子1. 不管他跟我开什么玩笑，我都不生气。
时间状语从句+习题练习(含答案)
专题: 时间状语从句在下列空格中填入适当连词。
1._________he comes tomorrow,I will ask where he has been.2._________he was speaking,everybody listened carefully.3.I saw her just now_________she was getting off the train.4.Have a good look at that man________you pass him.5.It was already eight o'clock_________we got there.6.I was about to go out_________a visitor came.7.We'll go to the country at the beginning of June,_________the summer harvest will start.8.He learned to speak German_________he was in Berlin.9.Henry is in charge of the office________Mr.Smith is away.10.I listen to the recorder_________I have time.11.He had learned Chinese_________he came to China.12._________the work was done,we sat down to sum up experience.13.I haven't seen him_________he moved to the other side of the town.14.I waited________ he came back.15.I didn’t recognize him________he took off his eyeglasses.16.She likes everything to be in place________she starts to work.17.The thieves ran away_________they caught sight of the police.18.They decided to go back home_________their money ran out.19.__________I get to the airport,I will phone you to pick me up.20.They were about to leave______it began to rain.Keys:1.When2.While/When3.as4.when/as5.when6.when7.when8.while9.whi le10.whenever11.before12.After13.since14.till/until15.until16.before17.as soon as18.before19.As soon as20.when。
状语从句[含练习和答案解析]
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第十二讲状语从句（含练习与答案）担任状语的从句叫状语从句，可以用来表示时间、地点、原因、目的、结果、条件、方式、比较、让步等。
一、时间状语从句：引导词有after，before，as，once，since，till，until，when，whenever，while，as soon as，the moment/minute…（一…就），the time, the day, every time, next time, each time，by the time ，no sooner…than（一…就），hardly(scarcely)…when（一…就）immediately/directly等．Each/Every time he comes here, he will drop in on me.He was ill last time I saw him.上次我见到他时他病了．Hardly had I got to the office when my wife phoned me to go back home at once.=No sooner had I got to the office than my wife phoned me to go home at once.I recognized him immediately I saw him.※ when, while与 as当主句动作时瞬时的，从句动作是延续的，三者都可以用。
when引导的从句动词可以是延续性的或短暂性的，在“be…when…”句式中when表“at that time(就在这时)”意。
while引导的从句中动词必须是延续性的；有时并不表示时间，而表示对比，意“而”、“却”，并列连词，表对照。
As 强调主、从句动作同时或几乎同时发生，意为“一边…一边…”。
When I got home I found the door locked.While / When / as we were working in the fields, it suddenly began to rain.He was wandering through the streets when a bike hit him.I was about to go out when the telephone rang.I had just arrived at school when my wife phoned me to go home.His pencil is red, while mine is yellow.John sang happily as he went along.※ till与until一般情况下可以互换，但until可以位于句首，till则不能。
初中英语状语从句讲解、练习与答案
状语从句状语从句用来修饰主句中的动词，副词和形容词的从句叫状语从句。
根据其含义状语从句可分为时间状语从句，地点状语从句，条件状语从句，原因状语从句，结果状语从句，比较状语从句，目的状语从句，让步状语从句。
1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。
例如：It was raining hard（rain hard 下大雨）when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along（沿着走）the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里，通常不用将来时态，用现在时态表示将来的动作或状态。
例如：I’ll ring you up as soon as I get to New York.I will tell him everything when he comes back.He won’t believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里，如果主句用肯定式，其含义是“一直到……时”，谓语动词只能用延续性动词。
如果主句用否定式，其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。
例如：The young man read till the light went out（熄灭）.Let’s wait until the rain stops.We won’t start until Bob comes.Don’t get off（从下来）until the bus stops.【Till是指直到某一特定事件发生的时候，而在那个时刻之后，该事情或状况仍将持续。
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时间状语从句用句子表达一件事情或一个行为发生的时间，这个句子就叫时间状语从句。
时间状语从句根据其所表示的时间不同，所使用的连词也不同。
下面我们一起来看一下几个常见的时间状语从句：1. when 引导的从句：表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。
例如：I was going out when a visitor came. (动词动作同时发生。
)我正要出门，有客人来访。
I shall tell her the good news when she comes.她来时，我将告诉她这个好消息。
小试牛刀：I found mother cooking for me. I got home.(when)He was listening to the radio when I home. (get)2. while 引导的从句：表示“当……过程中”，强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。
由于while 从句表示一个持续的行为，所以从句中要用持续性动词，并且持续性动词常用进行时态。
例如：Keep an eye on my little sister while I am away.我不在时，请照看一下我的小妹妹。
While we were watching TV, Jim came in. 我们看电视的时候，Jim 进来了。
小试牛刀：It started to rain. We were playing football.(while)Lucy was cleaning the room Lily was listening to music.3. as 引导的时间状语从句：表示“当……的时候；一边……一边……；随着……”，其从句的主语与主句的主语往往是同一人或物。
例如：She sang as she worked. 她一边工作一边唱歌。
=She was singing as she was working.I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。
小试牛刀：we walked, we talked.You will grow wiser you grow older.4. before 引导的从句：一般表示主句的动作发生在从句动作之前。
例如：I didn’t know any English before I came here. 我到这儿来之前，一点英语都不懂。
例如：I had written my report before my father came back.小试牛刀：He bought the ticket he went to see the film.5. after 引导的从句：表示主句的动作发生在从句动作之后。
例如：After he locked the door, he left. 他锁上门后，就走了。
After he had finished his work, he played a game of chess with his friend. 他做完工作后，和朋友下了一盘棋。
小试牛刀：I will go out to play basketball with you. I finish my homework.(after)_He left the classroom he had finished his homework the other day.6. since 引导的从句：表示“自从……以来”，从句中的动词一般表示动作的起点，用过去时。
主句中的动词表示动作延续的情况，一般用现在完成时。
如果主句中的动词表示的不是延续的动作而是表示目前的状态，可用一般现在时。
例如：Since he met this good friend, he has made great progress in his studies.自从遇见了这个好朋友，他已在学习上取得了巨大的进步。
例如：It is twenty years since she joined the Party. 她入党二十年了（。
主句中的动词表示的是状态，用现在时。
）小试牛刀：it is five years since we last time.（meet）Mr green has taught in that school since he (come) to China three years ago.7. until 引导的从句：表示一个动作持续到某一时刻。
（1）表示“直到……”，如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。
（2）表示“直到……才”，主句用否定式，从句用肯定。
如果主句中的谓语动词是瞬间动词时，必须用否定形式。
例如：They worked until it was late. 他们一直工作到天黑。
She didn’t go to bed until she finished her homework. 她写完作业才睡觉。
小试牛刀：All the people left. He waited.(until)He went to bed . his father came home.8. as soon as 引导的从句表示“一……就”，强调动作紧密相连。
例如：As soon as she came to the classroom, she began to read English.她一到教室，就开始读英语。
小试牛刀：We start to sing. It''s 12 o''clock. (as soon as)9. by the time 到。
为止(所在句子的主句应用完成时)例如：By the time he gets there , his father has already gone.他到家的时候，他爸爸已经走了。
小试牛刀：By the time I got to school, the class .（begin）我到校时，已经开始上课了。
知识扩展1. it is +时间段+since+一般过去时（从。
以来多长时间了）例如：it is five years since we met last time.从我们上次见面已经五年了。
2. it is/ will be +时间段+before+一般现在时，it was+时间段+before+一般过去时(。
才)例如：it is a long time before I go to sleep . 过了很长时间我才睡着。
it was an hour before the police arrived.过了一个小时，警察才来。
小试牛刀：It (be) ten years since we (leave) that city .It is reported that it may be two or three months it is possible to test this medicine on animalsHow long do you think it will be China sends a manned spaceship to the moon？3、when 和while 的区别4、巧记10 个瞬间性动词在学习以when 和while 引导的时间状语从句时，用到了瞬间动词和延续动词。
常见的瞬间动词有die(死)，come(来)，go(去)，eave(离开)，arrive(到达)，begin(开始)，buy(买)，,join(加入)，borrow(借进，借出)，return(归还)等。
这10 个瞬间动词可用两句口诀来帮助记忆: 开始离去,借来还, 出生入死,买到家。
注释:1. "开始离去,借来还"为begin,leave,go,borrow,come,return 六词；2."出生入死,买到家"为join,die,buy,arrive 四词。
3.各词改为相应的延续动词为：begin→be on, leave→be away from, borrow→keep, go→be, come→be here, return→be back, join→be in, die→be dead, buy→have, arrive→be here 等。
'5、状语从句与主句的时态问题1. 由when、while 引导的时间状语从句的时态：（主过从过）主句（过去进行时）+when +从句（一般过去）主句（一般过去时）+when +从句（过去进行时）主句（一般过去时）+while +从句（过去进行时）主句（过去进行时）+while +从句（过去进行时）注意：看动词为短暂性动词用一般过去时，动词为延续性动词则用过去进行时。
小试牛刀：Mother （cook）supper when I (get) home yesterday.Last Sunday I (meet) Lin Hong when I (walk) in the street.When the students (have ) a meeting, the teacher (come) in.While Han Meimei (sweep) the floor, Lucy (carry) water.2. 由when、after、before、by the time 引导的时间状语从句的时态：主句、从句的谓语动词都已完成，则先发生的动作用过去完成时，后发生的动作用一般过去时。
例如：After he had finished his work, he played a game of chess with his friend.小试牛刀：When they (get) to the cinema last light, the film (start).I (go) out with my friends after I (finish) all the homework last night.3. 时间状语从句与主句的时态不一致。
（主将从现：主句用将来时，而时间状语从句用一般现在时）小试牛刀：As soon as I reach Canada, I you up. (ring)I will call you as soon as I the result. (know)He (become) a solider when he (grow) up .He （wait）until the rain .( stop)一、单项选择。