英语语法时间状语从句.

高中英语语法_状语从句练习30题及详解

1. Tim is in good shape physically he doesn't get much exercise. A. if B. even though C. unless D. as long as 2. The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult. A. once B. when C. if D. unless 3. you may have, you should gather your courage to face the challenge. A. However a serious problem B. What a serious problem C. However serious a problem D. What serious a problem of the heavy traffic，it was already time for lunch break she got to her office． A．since B．that C．when D．until* m John thinks it won’t be long he is ready for his new job. A. when B. after C. before D. since 6. Today, we will begin ________we stopped yesterday so that no point will be left out. A. when B. where C. how D. what 7. She had just finished her homework her mother asked her to practice playing the piano yesterday. A. when B. while C. after D. since 8. My parents don’t mind what job I do I am happy. A. even though B. as soon as C. as long as D. as though 9. You can’t borrow books from the s chool library ______ you get your student card. A. before B. if C. while D. as 10. All the dishes in this menu, otherwise stated, will serve two to three people. A. as B. if C. though D. unless of the financial crisis, days are gone _ _ local 5-star hotels charged 6,000 yuan for

广州版7年级英语下册语法 U8时间状语从句

广州 初一英语Unit 8语法 【精讲点拨】 when引导的时间状语从句 一. 概念：在复合句中，由时间连接词引导的状语从句叫做时间状语从句。 二．1.．从句动作在主句动作前发生，只用when。 When he had finished his homework，he took a short rest．（finished先发生）当他完成作业后，他休息了一会儿。 When I got to the airport，the guests had left．（got to后发生）当我赶到飞机场时，客人们已经离开了。 2．在将来时从句中，常用when，且从句须用一般现在时代替将来时。 You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。 When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。 三．种类： 1.由when, while, as引导的时间状语从句。 （1）when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。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，并且when有时表示“就在那时”。 When she came in, I stopped eating. 她进来时，我停止吃饭。(瞬时动词) When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。（延续性的动词） （2）while强调主句的动作与从句的动作同时持续地进行，用于这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词，或者主句的动作发生在从句动作的进行过程中，主句中的谓语动词通常是非延续性动词，并且while有时还可以表示对比。 While my wife was reading the newspaper, I was watching TV. I met her while I was at school. I like playing football while you like playing basketball. （3）as引导时间状语从句时表示“当……时，一边……一边……”，侧重表示两个动作同时发生(包括一个主语同时进行两个动作)，或者一种动作随着另一种动作的变化而变化。 As the time went on，the weather got worse．（as表示“随着……”之意）

初中英语语法状语从句讲解专项练习及答案

初中英语语法状语从句讲解专项练习选择合适的连接词，完成下列句子。 spends a lot of money on books______he is not rich. fell into sleep ______she was listening to the music. David at school today ----No. He is at home ______he has a bad cold. , won't have supper ______my mother comes back. to him slowly ______he may understand you better. 6. ______ she doesn't come on Sunday, I'll go fishing by myself. is four years ______I had left that small village. 8. ______the air moves, it is called wind. will go to the park ______it doesn't rain tomorrow. boys did ______much work. are few new words in the passage ______we can't understand it. ? back ______you come from. reached the station ______the train had left. you have a swimming pool ----No, we don't. At least, not ______big ______yours. me your paper ______you have finished it. is raining hard, ______we have to stay at home. 17. ______you work harder, you'll never pass the final exam. after the children ______I am out. ' village is ______far away ______I can't get there on foot. is ______an interesting book ______I can't stop reading it. 能力提高练习 1 ( ) 1 The meeting didn't start___ everyone was there. A. because B. until C. why D. if ( ) 2 The boy ___ to bed ___ his mother came in. A. went not; until B. didn't go; after C. went; until D. didn't go; until ( ) 3 I won't believe you___ I have seen it with my own eyes. A. before B. until C. after D. when ( ) 4 He ___ home ___ she was satisfied ___ his answer yesterday. A. didn't go; until; with B. wasn't go; after; to C. doesn't go; before; with D. didn't go; until; to ( ) 5 He ___ back until the work ___ done. A. isn't; will be B. isn't; is C. won't be; will be D. won't be; is ( ) 6 They didn't start the work ___ their teacher came back. A. until B. while C. as soon as D. if 2 ( ) 1 Tom will call me as soon as he ___ Shanghai. A. arrives B. will reach C. arrives in D. get to ( ) 2 I'm sure he'll come to see me before he ___ Beijing. A. will leave B. is leaving C. leave D. leaves ( ) 3 I will tell him the news as soon as he___ back. A. come B. comes C. will come D. came 3 ( ) 1 Tom has got a watch. He ___ it for two years. It _______ by his father. A. has bought; was bought B. has got; is bought , C. was bought; has bought . D. has had; was bought "' ( ) 2 When he got to the station, the train ___. A. left B. had left C. leaves D. has left

英语语法之时间状语从句

时间状语从句常由以下连接词引导：when（当……时），as（一边……一边；当…时），while（在……期间），after（在……之后），before（在……之前），as soon as（一……就），since（自从），till(until)（直到……，直到……才），whenever（任何时候），the moment（一……就），no sooner than（一……就），hardly…when… （一……就）等。由以上连接词（或词组）连接的主从复合句中，主句和从句的动作，有的是同时发生，有的是先后发生。因此，要特别注意根据连接词所代表的时间不同，主句和从句的谓语要使用相应的时态。这是掌握时间状语从句的关键。 1. when 和whenever 引导的从句：从句的动作和主句的动作可以同时发生，也可以先于主句的动作发生。例如： When we reached home, it was already dark. 我们到家的时候天已经黑了。 When my cousin came yesterday, I was playing volleyball. 昨天我表哥来时，我正在打排球。 When it rains, I go to school by bus.下雨的时候，我坐车去学校。 I shall tell her the good news when she comes. 她来时，我将告诉她这个好消息。（主从句都表示将来发生的动作，但要注意从句中要用一般现在时，表示将来。） Come to see us whenever you can.你什么时候有空，就过来看看我们。 2. while 和as 引导的从句：while表示“当…过程中”，强调某一段时间主句和从句的动作在同时发生。as表示“当…时”或 “一边…一边”，主句和从句的动作同时发生。例如： Work while you work; play while you play. 该工作的时候就工作，该玩的时候就玩。 While he is reading, he always makes notes. 他经常一面看书，一面做笔记。 She sings as she goes along.她边走边唱。 You will grow wiser as you grow older. 随着年龄的增长，你会更加聪明起来。 3. before 和after 引导的从句：前者一般表示主句的动作发生在从句动作之前。后者表示主句的动作发生在从句动作之后。 例如： I didn’t know any English before I came here. 我来这儿之前，一点英语都不懂。 I had written my report before my mother came back.

(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。

英语入门之时间状语从句(完整)

[编辑本段] 简介 （adverbial clause of time） 概念：在复合句中，由时间连接词引导的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。） 时间状语从句 1.由when, while, as，after,before,since,untill,引导的时间状语从句。例如： When you think you know nothing, then you begin to know something. 当你以为自己一无所知的时候，你就是在开始知道一些事物了。 When truth is buried under the ground it grows, it chokes, it gathers su ch an explosive force that on the day it bursts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！ Strike while the iron is hot. 趁热打铁。 You can feel the air moving as your hand pushes through it. 当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke.我们的校长边谈边笑。 主要时态：主过从过；主将从现；主句为一般现在时，从句不受影响。 [编辑本段] 区别 when, while和as的区别：when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。并且when有时表示“就在那时”。例如：

高考英语语法知识点 专题27 时间状语从句

考点27 时间状语从句 高考频度：★★★★★ 考向一 when/while/as引导的定语从句 一、when引导的时间状语从句 1. when引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词，而且可以表示主句的动作和从句的动作同时发生，或者从句的动作发生在主句的动作之前。 When you apply for a job, you must present your credentials. 当你申请工作时，你必须递交你的有关证件。（同时） When the stude nts heard the teacher’s footsteps, they all atopped talking.当学生们听到老师的脚步声时，他们都停止了讲话。（从句动作发生在前） 2. when还可表示just then（正在那时，突然）的意思，此时其所引导的从句只放在主句之后。 be about to do ... when ... 正要去做某事，突然…… be doing ... when ... 正在做某事，突然…… be on the point of doing ... when ... 正在做某事，突然…… We were about to start when it began to rain. 我们正要动身，突然天下起雨来。 The game had hardly/scarcely/barely begun when it started raining. 比赛刚刚开始就下起雨来。 二、while引导的时间状语从句 while表示＂在某一段时间里＂或＂在……期间＂，其所引导的从句的动作是延续性的，并侧重表示和主句的动作同时发生。 When the teacher paraphrased the text in English, the students listened attentively and took notes. 当老师用英语解释课文时，学生们聚精会神地听并做着笔记。

英语语法大全之方式状语从句

英语语法大全之方式状语从句 方式状语从句通常由as, (just) as…so…, as if, as though引导。 1）as, (just) as…so…引导的方式状语从句通常位于主句后，但在(just) as…so…结构中位于句首，这时as从句带有比喻的含义，意思是"正如…"，"就像"，多用于正式文体，例如：Always do to the others as you would be done by. 你希望人家怎样待你，你就要怎样待人。 As water is to fish, so air is to man. 我们离不开空气，犹如鱼儿离不开水。 Just as we sweep our rooms, so we should sweep backward ideas from our minds. 正如打扫房屋一样，我们也要扫除我们头脑中落后的东西。 2）as if, as though 两者的意义和用法相同，引出的状语从句谓语多用虚拟语气，表示与事实相反，有时也用陈述语气，表示所说情况是事实或实现的可能性较大。汉译常作"仿佛……似的"，"好像……似的"，例如： They completely ignore these facts as if (as though) they never existed. 他们完全忽略了这些事实，就仿佛它不存在似的。（与事实相反，谓语用虚拟语气。） He looks as if (as though) he had been hit by lighting. 他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。） It looks as if the weather may pick up very soon. 看来天气很快就会好起来。（实现的可能性较大，谓语用陈述语气。） 说明：as if / as though也可以引导一个分词短语、不定式短语或无动词短语，例如： He stared at me as if seeing me for first time. 他目不转睛地看着我，就像第一次看见我似的。 He cleared his throat as if to say something. 他清了清嗓子，像要说什么似的。 The waves dashed on the rocks as if in anger. 波涛冲击着岩石，好像很愤怒。 https://www.wendangku.net/doc/40830526.html, 北京微课创景教育科技有限公司- 1 -

高考英语语法状语从句习题及讲解

高考英语语法状语从句习题及讲解 1. 状语从句的类型 1〕时间状语从句：常见引导词有： when：表示主句和从句的动作同时或先后发生，强调点，表“就在那时；突然”. while：常表示延续性动词或状态；while也可表示对比的转折. as soon as：表示从句的动作一发生，主句的动作马上就发生. hardly / scarcely … when；no sooner … than：表示“还没来得及……就；刚……就”. directly, immediately, instantly：副词当连词用，表示“一……就”. the moment, the minute, the second：充当连词，等于when / as soon as. each time, every time, next time, by the time等：也可以引导时间状语从句. since：引导的时间状语从句，主句常用现在完成时，从句常用一般过去时.常用句型：It is + 段时间+ since从句，“自从……有多长时间了”. until：常与not连用，表示“直到……才……”；Not until置于句首时，主句要部分倒装；在It is / was…that / who…强调结构中，须连在一起. 2〕让步状语从句：常见引导词有：although, though, even if, even though, as等. 3〕原因状语从句：常见引导词有： because：常用于回答why, 语气最强；强调原因，常与just, only等起强调作用的副词连用；可引导表语从句. for：是个并列连词，一般不放在句首，常表示一种推测或解释，或用作附加说明，语气弱. as, since：常译为“既然、由于”，表示十分明显的原因，语气较弱. now that：表示“既然”的意思. 4〕地点状语从句：常见引导词有：where, wherever等. 5〕目的状语从句：常见引导词有：that, so that, in order that等.目的状语从句的谓语动词常与情态动词连用，否则可能是结果状语从句.不可 置于句首.目的状语从句还可以用动词不定式来替换. 6〕结果状语从句：常见引导词有：that, so that, so … that, such … that …等. 7〕方式状语从句：由as, as if〔though〕等引导.

高考英语语法之：时间状语从句

三大从句是高中最重要的语法点，没有“之一”。对于从句的考察贯穿高考英语试卷的始终，从第一个单项听力，到最后的写作。名词性从句、状语从句以及定语从句三者重要性不分伯仲。 但正如大家知道的，“三大”之一的状语从句，种类繁多。时间、地点、原因、结果、条件、让步、条件、比较、方式9种，基本上大家在经历了学校课堂的洗礼后，也都耳熟能详。殊不知，这9种之中，对于高考来说，重要性的区别是很大的。考频为证，以2006-2010年5年全国高考18个省市的19套卷子的单项选择题为例，涉及到状语从句的题目共有93道，其中时间状语从句考到了24题，条件状语从句26题。孰轻孰重，不多赘述。 与名词性从句不同，状语从句最简单也最直接的办法就是牢固掌握相关连词或者连词词组的中文意思。以时间状语从句为例，需要掌握的连词范围如下： when/while/as/before/after/until/as soon as 1、when: 做“当……的时候”讲，是个尽人皆知的意思，所以高考是不会考到的。相对的，会考到“突然，就在那时”的意思，用以表示从句动作发生的突发性。 2010年全国II卷7题： Tom was about to close the windows _____ his attention was caught by a bird. A. when B. if C. and D. till 鉴于大家都看得明白，不多赘述。 2、while：当初很多老师讲的时候，告诉我们while和when的区别在于前者连接的主从句一定都用进行时态，是不对的。而且，这更不是判断二者区别的办法。 正解：while在同做“当……的时候”讲时，侧重表达主从句动作的对比关系，翻译成“而”字。 e.g. He has b een a father of 2 babies while I?m still single. 2010年全国I卷25题： Mary made coffee her guests were finishing their meal. A．so that B. although C. while D. as if 例句和真题都反复证明了不该在主从句时态上纠结，表示前后动作的对比才是王道。 3、as：同做“当……时”的时候，as更强调主从句动作同时发生，译作“一边……一边……” e.g. As he works, he studies. 他半工半读（一边工作一边读书）。

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.

英语语法之时间状语从句

时间状语从句 时间状语从句常由以下连接词引导：when（当……时），as（一边……一边；当…时），while（在……期间），after（在……之后），before（在……之前），as soon as（一……就），since（自从），till(until)（直到……，直到……才），whenever（任何时候），the moment（一……就），no sooner than（一……就），hardly…when…（一……就）等。由以上连接词（或词组）连接的主从复合句中，主句和从句的动作，有的是同时发生，有的是先后发生。因此，要特别注意根据连接词所代表的时间不同，主句和从句的谓语要使用相应的时态。这是掌握时间状语从句的关键。 1. when 和whenever 引导的从句：从句的动作和主句的动作可以同时发生，也可以先于主句的动作发生。例如：When we reached home, it was already dark.我们到家的时候天已经黑了。 When my cousin came yesterday, I was playing volleyball.昨天我表哥来时，我正在打排球。 When it rains, I go to school by bus.下雨的时候，我坐车去学校。 I shall tell her the good news when she comes. 她来时，我将告诉她这个好消息。（主从句都表示将来发生的动作，但要注意从句中要用一般现在时，表示将来。）Come to see us whenever you can.你什么时候有空，就过来看看我们。 2. while 和as 引导的从句：while表示“当…过程中”，强调某一段时间主句和从句的动作在同时发生。as表示“当…时”或“一边…一边”，主句和从句的动作同时发生。例如： Work while you work; play while you play.该工作的时候就工作，该玩的时候就玩。 While he is reading, he always makes notes.他经常一面看书，一面做笔记。 She sings as she goes along.她边走边唱。 You will grow wiser as you grow older.随着年龄的增长，你会更加聪明起来。 3. before 和after 引导的从句：前者一般表示主句的动作发生在从句动作之前。后者表示主句的动作发生在从句动作之后。例如：I didn’t know any English before I came here.我来这儿之前，一点英语都不懂。 I had written my report before my mother came back.我母亲回来之前，我已写完我的报告。 It will be long before we meet again.我们要过很久才能见面。 After he locked the door, he left.他锁上门，就走了。 After he had finished his work, he played a game of chess with his friend. 他工作完成以后，与朋友下了一会儿棋。 After you think it over, please let me know your decision.你想好以后，请告诉我你的决定。 4. till和until 引导的从句：表示“直到…”，主句和从句都为肯定式时，till和untill都可用；表示“直到…才”，主句用否定式，从句用肯定式,一般用untill。例如： They worked till(until) it was dark. 他们一直工作到天黑。 She didn’t go to bed until she had reviewed her lessons.她直到复习完功课才睡觉。 Not until I shouted at the top of my voice did he turn his head. 直到我高声喊叫，他才转过头来。(Not until放在句首时,主句的谓语动词要倒装.) (参见第十四课) 5. since和ever since 引导的从句：表示“自从以来”，从句一般表示动作的起点，用过去时。主句表示动作延续的情况，一般用现在完成时或现在完成进行时。如果主句表示的是时间时,主句可用一般现在时，也可用现在完成时。例如： Since he entered the university, he has made great progress in his studies. 自从他上大学以来，他在学习上取得了巨大的进步。 He has been working here ever since he left university.自从大学毕业以后，他就一直在这里工作。 It is/has been twenty years since she joined the Party.她入党二十年了。 It is/has been more than four weeks since school began.开学已经四个多星期了。 6. 短语连词as soon as, , no sooner...than, hardly(scarcely)...when引导的从句：这些短语连词表示“一…就”或“刚一…就”。由no sooner...than 和hardly(scarcely)...when引导的从句一般用过去完成时，主句一般用一般过去时。no sooner...than 或hardly(scarcely)...when位于句首时，句子需部分倒装(参见第十四课)。例如： I’ll tell him the news as soon as I see him.我一看见他就告诉他这个消息。 As soon as she came to the classroom, she began to read English.她一来到教室，就开始读英语。 The bell had no sooner rung than the students quieted down.铃声一响，学生们就安静下来了。 The examinee had scarcely finished the test when the bell rang. 这位考生刚做完考卷,铃声就响了.

中考英语语法专题 时间状语从句讲解+练习(无答案)

时间状语从句 常用引导词：when, while, as, as soon as, before, after, till/until, since 1、when, while, as （1）三者均可表示“当……时候”，如果主句表示的是短暂的动作，而从句表示的是一段时间，三者可通用。如： I met Kang Li while/when/as I was walking along the street．当我沿街散步时碰见了康丽。 Don’t make any noise while/when/as I am recording. 我录音时（你们）别发出声音。 （2）while 1）while只能与持续性动词连用，且常用进行时态。表示主句的行为在从句行为进行的过程中发生。如： While they were crossing the Atlantic, many people died. 他们中的很多人在横渡大西洋时丧生了。 2）表示主句和从句的动作同时发生。如： While the wife was cooking, the husband was watching TV. 妻子在做饭的时候，丈夫在看电视。 3）表示“然而”，主句和从句是两个对应的动作。如： Lucy likes dancing while Lily likes doing sports. 露西喜欢跳舞而莉莉喜欢运动。 （3）when 1）when既可以和持续性动作连用，也可以和瞬间性动作连用，主句与从句描述的动作既可以同时发生，也可以先后发生。如： When the weather is fine, many people go out for a walk. 天气好时，很多人都出去散步。 When I got home, I found my baby girl singing in the sitting room. 我到家时，发现我的小女儿正在客厅里唱歌。 2）表示“某人正在做某事，突然……”，主句用过去进行时，从句用一般过去时，表示一个动作正在进行的时候，另一个动作（突然）发生了，强调后一动作发生的突然性。如： We were talking when the teacher came in. 我们正在讲话，老师（突然）进来了。 试比较： While we were talking, the teacher came in. 我们正在讲话的时候，老师进来了。（不强调突然性。） 3）表示“某人正要做某事，就在这时……”，主句用过去将来时，从句用一般过去时。如： I was leaving when somebody touched my shoulder. 我正要离开，就在此时有人碰了一下我

完整版英语语法状语从句的归纳总结

在复合句中修饰主句或主句中的某一成分的从句 叫状语从句。状语从句通常由从属连词或起连词作用的词组引导，有时甚至不需要连词直接和主句连接起来。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。 一、时间状语从句 时间状语从句是表示时间关系的从句。可以引导时间状语从句的连词很多，根据意义和主从句之间的时间关系，通常可分为以下几种情况：A．when, while, as, whenever when, while, as表示主句谓语作和从句的谓语动作同时发生或几乎同时发生。 1．when ①when表示点时间时，从句中用短暂性动词；表 示段时间时，用持续性动词。 When I got home, my family were already having dinner. 我到家的时候，全家已在吃晚饭。 （when表示点时间） When they were still talking and laughing, the

teacher came in. 表示段when（当他们还在说笑的时候，老师进来了。时间） He waved a hello when he saw her. 当他看见她的时候，就挥手打了个招呼。（when 表示点时间） When you think you know nothing, you begin to know something. 当你认为自己一无所知的时候，就开始知道一些事情了。（when表示段时间） 注意： 当when意思是正当……时候（and at that moment）时，when只能跟在前一分句之后。 He was about to go to bed when the doorbel rang. 他正要上床，忽然门铃响了。 They were watching the World Cup when suddenly the lights went out. 他们正看着世界杯比赛，突然灯灭了。 They had just arrived home when it began to rain. 他们刚到家，天就开始下雨了。