(完整版)初中时间状语从句语法及练习
英语时间状语从句讲解与练习
（一）when, while 和as 引导时间状语从句的用法
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。
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。因为如果用正在进行时，它表示的就是一段时间而不是一个时间点了。根据这一点，有的文章补充说：when 从句的动词大多是瞬时动词。这种说法也可以参照。
实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。例如：
1. When I got to the airport, the guests had left. 当我赶到飞机场时，客人们已经离开了。
2. When he had finished his homework, he took a short rest.
当他完成作业后，他休息了一会儿。
3. Why do you want a new job when you have got such a good one already?
你已经找到如此好的工作，为何还想再找新的？
二、while 的用法
相比于when 来说，while 从句的侧重点就不一样了。while 从句的侧重点在于描述动作正在发生的状态，它的意思是：当while 事件正在发生的时候，另一件事如何如何。所以，while 从句一般用的是正在进行时。而另一件事的状态没有硬性的要求，根据具体情况而定。例如：
1.. While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。
2. You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。
从时间的角度来看，while 表示的是一段时间，是一个过程。这是while 的侧重点。因此，如果含有“一段时间”的含义的时候，就可以用while。
三、as 的用法
as 从句表示的也是一件事情正在发生，另一件事也正在进行当中。但与while 从句不同的是，as 从句用的一般不用正在进行时，而只是一般过去时。as 从句一般可以翻译成“边……边……”。例如：
1. As my mother sang those old songs, tears ran down her cheeks.
当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。
2. The students took notes as they listened. 学生们边听课边做笔记。
3. As we talked on, he got more and more excited. 我们继续往下谈的时候，他越来越兴奋。
as 表达的事件，往往只是主句动作发生的背景或条件时，as 只是一个次要的时间说明，不像while 从句有强调while 动作本身的意思。因此，as 常常翻译成“随着……”之意。
1. As the time went on，the weather got worse. 随着时间的推移，气候更加糟糕。
2. As years go by，China is getting stronger and richer. 随着时间一年一年过去，中国变得越来越富强了。
少数情况下，如果强调动作正在发生，as 从句也可以用正在进行时。这只能算是特例了。 1. He came in as I was going to bed. 我正要上床睡觉，他进来了。
四、when, while, as 的互换
如果从句动作和主句动作同时发生，并且从句动作为延续性动词时，when，while，as 可以互换使用。
1. When /While /As we were dancing, a stranger came in.
当我们跳舞时，一位陌生人走了进来。[dance 为延续性动词]
2. When /While /As she was making a phone call, I was writing a letter.
当她在打电话时，我正在写信。[make为延续性动词]
3. While/When/ As I was walking down the street, I noticed a police car in front of the
bank.
我顺着马路往前走时，发现银行门前停着一辆警车。
五、比较while, when, as
1）as, when 引导短暂性动作的动词。
2）当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或while。
3）从句表示“随时间推移”连词能用as，不用when 或while。
例如：As the day went on, the weather got worse.日子一天天过去，天气越变越坏。
（二）before和after引导的时间状语从句
1．Before是主句动作发生在从句的前面。注意before引导的从句不再用否定式的谓语，并且当before引导的从句位于主句之后，有时译成“就，才”。还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在时；如果before引导的从句谓语用的是过去时，则主句动词多用过去完成时，这样以便体现动作发生的先后。2．After表示主句动作发生在从句动作之后。主句和从句的动作的时间关系正好与before引导的从句相反。例如：It will be four days before they come back. 他们要过四天才能回来。
Einstein almost knocked me down before he saw me.爱因斯坦几乎把我撞倒才看到我。
（三）比较until和till 的用法
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。
区别：1）until可用于句首，而till通常不用于句首。
例如：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。
3）N ot until…在句首，主句用倒装。
例如：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。
5）It is not until… that….
例如：It was not until I began to work that I realized how much time I had wasted.
（四）巧辨before和until
一、在下列情况下，两者可互换用，但含义略有不同。before表示“在……之前”的意思，强调时间先后关系；而until表示“直到……才”的意思，主句是肯定句则表示主句动作的终止时间；主句是否定句则强调主句动作的起始时间。
1.主句为否定式终止性谓语动词。常见的动词是open,start,leave,arrive,finish,
stop等。例如：
(1)The noise of the street didn't stop until/before it was midnight.
(2)The children won't come back until/before it is dark.
2.主句为肯定式、延续性谓语词，这类动词用stand,stay,talk,be,wait等。例如：
(1)He lived with his parents until/before he graduated from school.
(2)I will wait until/before he comes to my help.
二、在下列情况下，用before不用until。
1.主句这肯定式、终止性谓语动词，只用before。例：
(1)He fell asleep before I could take off his clothes.
(2)We arrived there before it atarted to rain.
2.主句谓语动词强调动词的迟缓性，只用before，常伴有时间段状语或时间段暗示。例：
(1)It was quite some time before he found the elephant at all.
(2)We had walked a long way before we found some water.
3.如果强调从句谓语动作未发生，就发生主句谓语动作，只用before。常译为“未及”，“不”或“不等……就”。
(1)We can leave early in the morning before it gets too hot. (2)I must write it down before I forget it.
4.表“与其说……倒不如”，“与其……毋宁……”只用before。例：
(1)I would give up my job before I'd agree to be dismissed. (2)He will die of hunger before he will steal.
5.在某些特定句型中用before。例如：
(1)It was not long before the whole country rose up.
(2)It will probably not be long before they understand each other.
三、下列情况一般区别用until。
1.主句是持续性谓语动词时，肯定、否定都可以，但意义完全不同。肯定表动作终止，而否定表动作开始。
(1)We discussed the problem until/before he came back.我们一直讨论到他回来。
(2)We didn't discuss the problem until he came back.我们一直等到他回来后才讨论问题。
2.not…until句型尽管在某些情况下可与before互换用，但在强调句中一般仍用until。
(1)It was not until he told me that I knew it.
(2)It was not until he finished his homework that he went home.
（五）其他时间状语从句的用法
1.由since引导的时间状语从句。
since引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时。但在It is ＋时间＋since从句的句型中，主句多用一般现在时。例如：
I have been in Beijing since you left. 自从你离开以来，我一直在北京了。
Where have you been since I last saw you? 自上次我和你见面以后，你到哪里去了？
知识扩展
1. It is since从。。。以来多长时间了(因为since +从句或名词，表示一段时间)
It is five years since we met last time.从我们上次见面已经五年了。
2. It is +before…(。。。才)
It was a long time before I went to sleep again.过了很长时间我才睡着。
It was an hour before(＝until) the police arrived.过了一个小时，警察才来。
2.由as soon as, immediately, directly, instantly, the moment, the instant, the minute, 等引导的时间状语从句。
这些连词都表示“一……就”。例如：
I will go there directly I have finished my breakfast. 吃完早饭，我立即到那里去。
As soon as I reach Canada, I will ring you up. 我一到加拿大，就给你来电话。
3.由by the time引导的时间状语从句。
注意时态的变化：在一般情况下，如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时；如果主句的谓语动词用一般现在时，主句的谓语动词用将来完成时。例如：
By the time you came back, I had finished this book.到你回来时，我已经写完这本书了。
By the time you come here tomorrow, I will have finished this work. 你明天来这儿的时候，我将已经完成此工作了。
注意：when while as after before as soon as since till /until by the time 在时间状语从句中，要注意时态一致。一般情况下主句是将来时的时候，从句要用一般现在时。
六、练习：在下列各句的空格中填入适当的连词
1．_________ he comes tomorrow, I shall ask where he has been.
2．_________ he was speaking, everybody listened carefully.
3．I saw her just _________ 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. It was not ________ he took off his eyeglasses that I recognized him.
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. We played outside till sunset, _________ it began to rain。
20. __________ I get to the airport, I will phone you to pick me up.
21. They were about to leave ______ it began to rain.
22. He always stay in bed ______ lunch time.
23. I like playing tennis _________ my younger sister prefers watching ball games.
24. _________ I understand your viewpoint, I don’t agree with y ou.
25. _______ she grew older, she became more responsible.
二、从A、B、C、D中选出可以填入空白处的最佳答案。
1. It was quiet ________ those big trucks started coming through the town.
A. before
B. after
C. until
D. unless
2. It seemed only seconds ________ the boy finished washing his face.
A. when
B. before
C. after
D. even if
3. Hardly had he reached the school gate ________ the bell rang.
A. while
B. when
C. as
D. as soon as
4. ________ you begin, I think you must continue.
A. When
B. Whenever
C. Once
D. Even if
5. I remembered you ________ I saw you at the airport.
A. the moment
B. while
C. after
D. once
6. He was about to go to bed ________ the doorbell rang.
A. while
B. as
C. before
D. when
7.________I listen to your advice, I get into trouble.
A. Every time
B. When
C. While
D. Until
8. _____ John was watching TV, his wife was cooking.
A. As
B. As soon as
C. While
D. Till
9. The children ran away from the orchard(果园) ______ they saw the guard.
A. the moment
B. after
C. before
D. as
Key: 1. When 2. While / When 3. as 4. when/as 5. when 6. when 7. when 8. while9. while10. whenever11. before 12. After 13. since 14. till/until 15. until 16. before17. as soon as 18. before 19. when20. As soon as21.when 22. until
23. while24. While 25. As
二、1. C 2. B 3. B 4. C 5. A 6. D 7.A 8.C 9.A
初中英语语法知识—状语从句的全集汇编附答案(1)
一、选择题 1．If you _______ someone, you invite them to flight or compete with you in some way. A．encourage B．challenge C．introduce 2．—the water was cold , Wei Qinggang jumped into it to save others. A．Although B．When C．If D．Because 3．________ haburgers are junk food, many children still like them. A．If B．Unless C．Because D．Although 4．I watched the World Cup in a bar last night and I home 1:00 in the morning. A．go; until B．went; until C．didn’t go; until D．won’t go; until 5．You will never get anywhere you set a goal. So whatever we do, we should first have a goal. A．unless B．because C．though 6．Jenny often eats a lot of fruit and vegetables_______she knows they are good for health. A．because B．but C．or 7．Amy is_______ careful that she made_______ mistakes in her last exam. A．so; so few B．such; so little C．so; such few D．such; such little 8．—I’m afraid I can’t finish the job in such a short time. —Don’t worry. Can you do it if you_______ two more hours.? A．give B．are given C．will give D．will be given 9．— Would you please ask Tom to come to my office? —Sure, I will tell you about it as soon as he _______back tomorrow. A．will come B．came C．comes D．is coming 10．--______ will the discussion last? --______ we reach an agreement. A．How long; Not until B．When; Not until C．How long, Until D．When, Until 11．I don’t like science _______it’s difficult. A．but B．so C．because 12．—You look so sleepy. What’s the matter with you , Carmen? —I’ve been working for ten hours. I am__________tired ___________ I want to sleep. A．so ; that B．such; that C．between; and D．neither; nor 13．—If it________tomorrow, I’ll go fishing. — May I go along with you? A．didn’t rain B．won’t rain C．doesn’t rain 14．Joan was walking in the street________ she saw the accident.
初中英语时间状语从句讲解及练习
语法 29时间状语从句 一、什么是状语从句 状语就是在一句话中表示该句子的时间、地点、方式、原因、条件等成分。状语从句就是用一个从 句表示状语。状语从句根据它表达的意思不同，可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等九类。 与状语一样，状语从句的位置比较灵活。既可置于主句之前（通常用逗号与主句隔开），也课置于主句之后（不需要用逗号与主句隔开），有时甚至可以置于主句之中。 二、时间状语从句 1. 主句和从句同时发生，这类从句由从属连词when, while, as引导。 He was hungry when he came home. I was crying while everyone was laughing. As I walked out, he walked in. as, when, while, 的区别 ① as强调从句的动作与主句动作同时发生及持续，具有at the same time的意思 他继续往下谈的时候，越来越兴奋。 as还可以表示一边??一边??，强调从句和主句中两个动作交替进行或同步进行。 他们边走边聊。 as还有“ 随着”的含义 随着春天的到来，天气暖和起来。 ② when 强调动作点的特定时间，具有at the time that 的意思 当老师走进来的时候，我们都站起来了。 ③ while 表示较长的期间，具有during the time that 的意思 当我在这的时候，我很安全。 2.主句发生在从句之前，这类从句由从属连词before, until 引导 ,before 意为“ 在---之前” until 在肯定句中意为“直到 --- 为止”，在否定句中意为“直到 --- 才”。从句既可置于主句前，也可置 于主句之后。 回家之前我必须干完所有的活。
初中英语语法——If引导的条件状语从句(讲解及练习)
条件句从句主句 真实一般现在时一般将来时 情态动词+动原祈使句 非真实 一般过去时 be动词用（were） would/could+动原初中英语――条件状语从句（讲解&练习） Ⅰ条件状语从句的定义 Ⅱ条件状语从句的引导词 1.if引导的条件状语从句：表示在某种条件下某事很可能发生。 If we pay much attention to the earth, we'll have a better world. 如果我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我们怎么办？ 注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。 What would happen if there were no water ? 如果没有水会怎样？ 2.unless引导的条件状语从句，unless的意思是如果不，除非。可与if...not互换。 You will fail in English unless you work hard. 你英语考试会不及格的，除非你更加努力。 3.as /so long as引导的条件状语从句：as /so long as意思是“只要” So long as you're happy,i will be happy. 只要你高兴，我就高兴。 Ⅲ条件状语从句的种类 Ⅳ条件状语从句的时态原则 用法例句 ①主句为一般将来时态，if从句用一般 现在时态（即主将从现）。We will stay at home if it rains tomorrow. 如果明天下雨，我将要呆在家。 ②主句中含有情态动词，if从句用一 般现在时态。If you finish your homework, you can go home now.如果你做完了作业，你现在可以回家了。 ③主句为祈使句，if从句用一般现在 时态。Don’t jump into the river if you feel very hot. 如果你感到很热，不要跳入河里。 ④主句为过去将来时，if从句用一般 过去时态（如果涉及到be动词， 一律都用were）。此时，表达的是和现实相反的推测，用虚拟语 气。If I were you, I wouldn’t do it like that.如果我是你，我就不会那么做的。 If you gave me some money, I would be very happy. 如果你给我一些钱，我就会很高兴的。 二、if 引导的条件状语从句 （1）“if 从句+祈使句”的句子。其实，if 作为一个连词，主句也可以是其他形式的句子。 例如：If you want to go, please let me know. (2)“祈使句 + and (or)+ 陈述句”
(完整版)初中英语语法专题(状语从句)讲解
初中英语语法专题（状语从句）讲解 状语从句在复合句中作状语，修饰动词、形容词或副词等。状语从句可以表示时间、条件、原因、地点、目的、结果、让步、方式、比较等意义。 知识梳理：提纲挈领，抓住重点和难点！ 各类状语从句连接词（短语）一览表： 时间 when, while, as, as soon as, since, until, after, before 条件 If, unless 原因 As, because, since 地点 Where 目的 So that, in order that 结果So that, so…that, such…that 让步 though, although, even if, however 方式 As 比较 t han, (not)as…as, 时间状语从句： Whenever he comes, he brings a friend. 他每次来都带个朋友。 条件状语从句： As long as I am alive, I will go on studying. 只要我活着，我就要学习。 原因状语从句： Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。 地点状语从句： Put it where we can all see it.把它放在我们都能看到的位置。 目的状语从句：
Finish this so that you can start another.把这个做完，你可以开始另一个。 结果状语从句： He was so angry that he couldn't say a word. 他气得说不出话了。 让步状语从句： Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。 方式状语从句： Students do as the teachers say.学生们按照老师说的去做。 比较状语从句： The work isn't as easy as I thought.这项工作比我想象得难。 例题解析：举一反三，学的更轻松！ 1. 易混引导词while, when, as的区别： when既可以指"时间点",与瞬间动词连用，也可以指"时间段"，与延续性动词连用 （=while）。如： When he came in, his mother was cooking. When (While) we were at school, we went to the library every day. While表示时间段,因此，while 从句的谓语动词要用延续性动词。如： Please don't talk so loud while others are working. As与when用法相似，但着重强调主句动作与从句动作同时发生，有"随着……"或"一边……一边……"之意。如： As you get older, you get more knowledge.随着年龄的增长，你获得的知识就越多。 2．Because,as,since 的区别： Because用于表示直接原因,回答why提出的问题，语气最强；As用于说明原因, 着重点在主句，常译成"由于"；since表示显然的或已知的理由或事实，常译成"既然"。如： Water is very important because we can't live without it. He didn't come yesterday as his mother was ill. I'll do it for you since you are busy.
初中时间状语从句语法及练习(全)汇编
状语从句 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 temper.（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 wil l go 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（一……就）…… 时态：主将从现，主情从现，主祈从现 一、When/while/as（当…时候）
初中英语语法状语从句大全
初中英语语法状语从句大全 1.时间状语从句 引导连词有when，while，till，not…until，since， after ,before ,as soon as The bus won’t start until everybody gets on. 公共汽车直到每人都上车为止，才开动。 When he knocked at the door I was cooking. 当他敲门时，我正在煮饭。 Last night before he came back home, his wife had already cooked dinner and waited for 2 hours. 昨天晚上在他回到家之前，他的妻子已经做好晚饭足足等了他两小时之久。 After I went to church, I went shopping. 2. 地点状语从句 地点状语从句通常由where, wherever 引导。 Where there is a will, there is a way. 哪里有志向，哪里就有出路。有志者事竟成。 Where there is a life, there is a hope. 哪里有生命，哪里就有希望。留得青山在，不怕没柴烧。 Wherever you go, whatever you do, I will be right here waiting for you. 不管你去哪里，不管你做什么，我都会在此守侯你。
3.原因状语从句 引导连词有because，as, since。 He didn′t see the film because he had seen it. 他没有看那部电影，因为他已经看过了。 They couldn’t get on the train，for it was too crowed. 比较：because, since, as和for 1) because语势，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，就用as或 since。 I didn't go, because I was afraid. Since /As the weather is so bad, we have to delay our journey. 2) 由because引导的从句如果放在句末，且前面有逗号，则能 够用for来代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用for。 He is absent today, because / for he is ill. He must be ill, for he is absent today.
初中英语语法状语从句专练及答案
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初中英语语法状语从句讲解专项练习及答案
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八年级时间状语从句教案
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初中英语状语从句
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初中英语语法状语从句-精华版
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： When while as 的区别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. 【。固定组合里from morning till night，till/until是不能替换的，】 2. 条件状语从句 (1)条件状语从句通常由if, unless引导。例如： What shall we do if it snows tomorrow? Don’t leave the building unless I tell you to. (2)在条件状语从句里，谓语动词通常用现在时态表示将来的动作或状态。例如： I’ll help you with your English if am free tomorrow. He won’t be late unless he is ill. (3)“祈使句+ and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。例如： Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late. Study hard and you will pass the exam. =If you study hard, you will pass the exam. 3. 原因状语从句 (1)原因状语从句通常由because, since, as引导。例如： He didn’t come to school because he was ill. As it is raining, we shall not （不得；不应该）go the zoo. Since you can’t answer the question, I’ll ask someone else.
初中时间状语从句语法及练习
英语时间状语从句讲解 （一）when, while 和as 引导时间状语从句的用法 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. 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。 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。因为如果用正在进行时，它表示的就是一段时间而不是一个时间点了。根据这一点，有的文章补充说：when 从句的动词大多是瞬时动词。这种说法也可以参照。 实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。例如： 2. When he had finished his homework, he took a short rest. 3. Why do you want a new job when you have got such a good one already? 二、while 的用法 相比于when 来说，while 从句的侧重点就不一样了。while 从句的侧重点在于描述动作正在发生的状态，它的意思是：当while 事件正在发生的时候，另一件事如何如何。所以，while 从句一般用的是正在进行时。而另一件事的状态没有硬性的要求，根据具体情况而定。例如： 1. While my wife was reading the newspaper, I was watching TV. 2. While Jim was mending his bike, Lin Tao came to see him. 3. While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。 从时间的角度来看，while 表示的是一段时间，是一个过程。这是while 的侧重点。因此，如果含有“一段时间”的含义的时候，就可以用while。 6. Strike while the iron is hot. 趁热打铁。 这句话中，是说趁着铁是热的这段时间，赶紧打铁。如果换成when 意思就变了，相当于说铁只热了一下，打一下，然后铁就冷了。这显然不符合文意。 再例： —I'm going to the post office. —While you're there, can you get me some stamps? 三、as 的用法 as 从句表示的也是一件事情正在发生，另一件事也正在进行当中。但与while 从句不同的是，as 从句用的一般不用正在进行时，而只是一般过去时。as 从句一般可以翻译成“边……边……”。例如： 1. As my mother sang those old songs, tears ran down her cheeks. 2. The students took notes as they listened. 学生们边听课边做笔记。 3. As we talked on, he got more and more excited. as 表达的事件，往往只是主句动作发生的背景或条件时，as 只是一个次要的时间说明，不像while 从句有强调while 动作本身的意思。因此，as 常常翻译成“随着……”之意。 例如： 1. As the time went on，the weather got worse. 随着时间的推移，气候更加糟糕。
(完整)初中英语语法状语从句讲解及练习附答案
初中英语语法专题讲座——状语从句 状语从句在复合句中作状语，修饰动词、形容词或副词等。状语从句可以表示时间、条件、原因、地点、目的、结果、让步、方式、比较等意义。 知识梳理：提纲挈领，抓住重点和难点！ 各类状语从句连接词（短语）一览表： 时间 when, while, as, as soon as, since, until, after, before，as long as（长达……之久） 条件 If, unless,as/so long as(只要) 原因 As, because, since，as/so long as(既然,因为) 地点 Where 目的 So that(为了), in order that 结果 So that（方便）, so…that,such…that 让步 though, although, even if, however 方式 As 比较than, (not)as…as, 时间状语从句： Whenever he comes, he brings a friend. 他每次来都带个朋友。 They all continued their regard for me as long as they lived. 他们毕生都在关心着我. 条件状语从句： As long as I am alive, I will go on studying. 只要我活着，我就要学习。 原因状语从句： Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。 地点状语从句： Put it where we can all see it.把它放在我们都能看到的位置。 目的状语从句： Finish this so that you can start another.把这个做完，（为了）你可以开始另一个。 结果状语从句： He was so angry that he couldn't say a word. 他气得说不出话了。 让步状语从句： Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。