状语及状语从句解析
状语及状语从句(语法加练习完整讲解)
结果状语从句
The problem is so difficult that it will take us time to work it out. 这道题如此难以至于我们要用很多时间才能解决。
She is such a kind girl that everyone likes her. 她非常善良，以至于每个人都喜欢她。
not that...but that...(不是因为...而是因为)
条件状语从句
If you want to succeed, you'd better work hard. 如果你想成功，最好努力工作。 I'll come unless it rains. 除非下雨，否则我一定来。 You can borrow the book as long as you promise to keep i Ming studied so hard that he caught up with the others very quickly． 李明学习如此努力，结果很快赶上了其他人。
6．程度状语： I nearly forgot what he had promised． 我几乎忘记了他答应的事。
(2)如果动词前有一个或几个助动词，状语位于第一个 助动词之后。 He has already had his lunch．他已吃过午饭了。
(3)如果动词是be，状语就放在be动词之后。 He is always at home. 他总是在家。
3.状语位于句末，这是状语的通常位置。
We get up at six in the morning. 我们早晨六点起床。
三、状语的分类：
状语按用途可分为：地点、时间、原因、目的、 结果、条件、让步、程度、方式、伴随情况等几类。
(完整版)状语从句详解+例句
(完整版)状语从句详解+例句状语从句是指在复合句中充当状语的从句。
状语从句可以用来表示时间、原因、条件、目的、程度、方式等各种状况。
下面将详细介绍状语从句的各种类型及其例句。
1. 时间状语从句时间状语从句用来表示主句所描述的行为或状态发生的时间。
常用的连接词有when（当...时候）、while（当...期间）、as（当...时）、before（在...之前）、after（在...之后）、since（自从）等。
例句：- I will call you when I arrive in Beijing.（当我到达北京时，我会给你打电话。
）- He was reading a book while she was cooking.（她在做饭的时候，他在看书。
）2. 原因状语从句原因状语从句用来表示主句所描述的行为或状态的原因。
常用的连接词有because（因为）、since（因为）、as（由于）、for （因为）等。
例句：- I can't go to the party because I have to work.（我不能去参加派对，因为我得工作。
）- Since it is raining, we should stay at home.（由于下雨了，我们应该待在家里。
）3. 条件状语从句条件状语从句用来表示主句所描述的行为或状态的前提条件。
常用的连接词有if（如果）、unless（除非）、whether（无论）、provided（倘若）等。
例句：- If it rains tomorrow, we will stay indoors.（如果明天下雨，我们会呆在室内。
）- We can go shopping unless it is too late.（除非太晚，否则我们可以去购物。
）4. 目的状语从句目的状语从句用来表示主句所描述的行为或状态的目的。
常用的连接词有so that（以便）、in order that（为了）、lest（免得）等。
从句成分及功能解析
从句成分及功能解析从句是句子中的一个独立成分，它可以在句子中担任主语、宾语、定语、状语等不同的语法功能。
本文将从句子成分及其功能两个方面进行解析。
一、从句的成分从句在句子中可以充当主语、宾语、定语和状语等不同的成分。
1. 从句作主语从句可以作为主语出现在句子中，引导从句的连接词常常是that、whether、if 等。
例如：- That he passed the exam is a great relief.（他通过了考试是一件大解脱。
）- Whether she will come or not is still uncertain.（她是否会来还不确定。
）- If it rains tomorrow, we will stay at home.（如果明天下雨，我们会待在家里。
）2. 从句作宾语从句可以作为宾语出现在句子中，常见的连接词有that、whether、if等。
例如：- She doesn't know that he is leaving.（她不知道他要离开。
）- I wonder whether he will come to the party.（我想知道他是否会来参加聚会。
）- Can you tell me if there is a bus to the airport?（你能告诉我是否有去机场的公交车吗？）3. 从句作定语从句可以作为定语出现在句子中，修饰名词或代词。
例如：- The book that you recommended is very interesting.（你推荐的那本书非常有趣。
）- I met a girl who can play the piano very well.（我遇到了一个弹得很好钢琴的女孩。
）- Do you have any idea where my keys are?（你知道我的钥匙在哪里吗？）4. 从句作状语从句可以作为状语出现在句子中，表示时间、原因、条件、目的、方式等。
状语从句知识点详解(初中英语专项复习)16
状语从句知识点详解（初中英语专项复习）一个句子做整句话的状语，这个句子就叫做状语从句。
状语从句根据从句在整句中表示的含义不同又可细分为时间状语从句、地点状语从句、原因状语从句、结果状语从句、目的状语从句、条件状语从句、让步状语从句、比较状语从句、方式状语从句等。
接下来我们重点复习几类状语从句。
一、时间状语从句定义和特征英语里如果用从句来表达一件事情或者一个动作发生的时间，那么这个从句就叫时间状语从句。
时间状语从句通常由when, while, as, before, after, since, as soon as, till/until等词引导。
【特征】含有时间状语从句的复合句，如果主句用一般将来时，从句用一般现在时表示将来。
（主将从现）—Daddy, when will we go out to fly a kite？—As soon as the rain _____．A. is stoppingB. stoppedC. will stopD. stops【答案】D【解析】句意：——爸爸，我们什么时候出去放风筝？——雨一停下（我们就去）。
as soon as 一……就……，引导时间状语从句，主句用一般将来时，从句用一般现在时。
故选D。
几种常见时间状语从句。
when引导：when表示“当……时候”。
既可表示在某一时间点发生的事，又可表示在某一时间段发生的事。
主句与从句描述的动作或事情可以是同时发生，也可以先后发生。
When I got home, I found my baby girl singing in the living room.当我到家时，我发现我的小女儿正在客厅里唱歌。
Things were different when I was a child.我小时候情况与现在不同。
【注意】when从句中的谓语动词可以是延续性动词，也可以是短暂性动词。
while引导：while表示“当……时候；在……期间”。
初中英语状语从句详细解析
初中英语状语从句详细解析 状语从句是英语语法中的常⽤句型语法，那么⼤家是否清楚什么是状语从句呢?下⾯就是⼩编给⼤家带来的初中英语状语从句详细解析，希望能帮助到⼤家! 状语从句详细解析 ⼀、什么是状语、状语从句? 状语：是⽤来修饰动词、形容词、副词或全句⽤的。
eg：He works hard! (他努⼒⼯作)中的hard。
状语的位置： 修饰形容词或副词的状语放在被修饰语之前。
eg：The Summer Palace is very beautiful.颐和园⾮常美丽。
(very 为状语，修饰形容词 beautiful，放在 beautiful 之前)。
修饰动词的状语有的放在动词前，有的放在动词之后。
如果动词有宾语，状语⼀般须放在宾语之后。
eg： I He often came here to see me.他经常到这⾥来看我。
(often 为状语，修饰动词came，放在前⾯)。
I know him well.我⼗分了解他。
(well为状语，修饰动词 know，放在 know 之后)。
状语从句：⽤⼀个(从句)来作另⼀个句⼦(主句)的状语，⽤作状语的句⼦就叫作状语从句。
作什么样的状语就叫什么类型的状语从句。
例如：条件状语从句就是⽤⼀个句⼦来作条件状语。
⼆、状语从句的分类。
(1)时间状语从句 凡是从句都必须有引导词，引导时间状语从句的词有when，before，after，until，as soon as，while 等，具体⽤法如下： 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。
eg: I feel very happy when you come to see me. When you are crossing the street，you must be careful. when引导的时间状语从句，when的从句可以⽤延续性动词，也可以⽤瞬间动词。
初中英语状语从句讲解及典型例题
状语从句在复合句中，用作状语的从句叫状语从句。
状语从句根据它表达的意义可以分为：时间状语从句、地点状语从句、原因状语从句、结果状语从句、让步状语从句、条件状语从句、目的状语从句、比较状语从句、方式状语从句。
（1）时间状语从句引导时间状语从句的连词或短语有：when, while, as, before, after, since, until, as soon as, once, each time, next time等。
1.When引导的时间状语从句When引导时间状语从句时，意为“当....时”，表示主句的动作与从句的动作同时或先后发生。
例：When you are doing your homework, you must be careful.Someone knocked（敲）at the door when I was sleeping.When she first saw the robot, she felt astonished（惊讶）.When Tom got home, he wept with anger.注意：when引导的时间状语从句中的动词可以是延续性的，也可以是非延续性的。
2.while引导的时间状语从句while引导的时间状语从句，意为“与...同时；在...期间”例：They entered the room while we were discussing problems.Father was cleaning the car while I was playing computer games.When she was in college, she felt in love with Mike.注意：while引导的时间状语从句中的动词必须为延续性或者表示状态的动词。
3.as引导的时间状语从句as引导的时间状语从句，表达“正当...，一边...一边...”强调主从句动作同时发生。
高中英语状语从句用法详细解析
高中英语状语从句用法详细解析之袁州冬雪创作一、定义：在句中作状语的从句是状语从句，修饰主句中的动词、形容词或副词等.状语从句由从属连词引导，从属连词在句中不充当句子成分，只起毗连作用，状语从句放在句首时，要用逗号，放在句尾时不必.二、分类根据意义上的分歧，状语从句可分为：①时间状语从句②地点状语从句③原因状语从句④目标状语从句⑤条件状语从句⑥成果状语从句⑦让步状语从句⑧方式状语从句⑨比较状语从句三、时间状语从句（一）引导时间状语从句的连词有：as, when(whenever), before, after, as soon as, until(till), since, every time, once.（二）、“as” as, when, while都有“当……的时候”，可以互用When she was a child.While she was a child. She Lived in Paris.As she was a child.as有“一边…一边”的意思He sang as he walked.“when”When the clock struck twelve, allthe lights went out.I was sleeping when she came in. 动补When we arrived at the station, the train had left.“while” 主、从句动作或状态同时发生.用while引导的从句用延续性动词，常暗示较长的时间或一个过程.While we were having supper, all thelights went out.Please keep quiet while others are studying.While I was writing letters last night, he was watching TV.when, while并列连问.when和while都可用作并列连问，毗连并列分句.When暗示“就在……的时候”, while意反而，可是，暗示转折.One evening Beethoven was walking in a street, when he suddenly stopped outside a little house.并列连词引导并列句，意思是就在那时.（三）、主句是一般将来时，时间状语从句用一般现在时表将来，主句是过去将来时，从句用一般过去时暗示过去将来时，主句是一般过去时，从句用一般过去时.1. I' ll call you when I get there.2. They said they would leave when they got the new.3. They left as soon as they got the new.Whenever 无论什么时候，随时1. Whenever someone throws in some rubbish, the truck produces a piece of music.每当有人扔进一些渣滓时，它（汽车）就放一段音乐.2. Whenever we' re in trouble, they will help us.3. I go to the theatre, whenever I am free.4. Come and see me whenever you want to.你随时来看我.till和until(暗示“直到……”)句首多用until1、在必定句中暗示“直到……为止”，主句谓语动词要用延续性动词.I was waiting until/till he arrived.2、在否定句中暗示“直到……才”主句谓语动词常常使用终止性动词，这时until和till常被before替换.I didn' t leave till/until she cameback.since: 主句用完成时，从句用一般过去时，since引导的从句间或可用现在完成时.It is two years since I have studied English.1. We have known each other since we were children.2. We have been friends (ever since) since we met at school.3. It is …… (一段时间)+since+一般过去时态句子.It is two years since my sister married.……(一段时间) have/has passed since +一般过去时态句子Two sisters have/has passed since my sister married.Since+时间点1. I have been at home since three o' clock this afternoon.2. Maria has been in China since two years ago.*every time, each time, next timeEvery time you get back at night, you drop your boots on the floor.Every time I catch cold, I have pain in my back.(every time 分写不成以合写) 比较everyday (adj) 日常的，普通的every day 是名词短语，天天，天天Next time I go there, I will visit them.* once 一旦…就Onceyou begin, you must go on. 你一开了头，就应该继续下去.四、地点状语从句地点状语从句用where, wherever引导We should go where the people need us.我们应该去人平易近需要我们的地方.Where there is a will, there is a way. 有志者，事竟成.Wherever they went, they received a worm welcome. 无论他们走到哪儿都受到热烈欢迎.She follow him whose he goes. 他无论到哪里她总跟着.五、原因状语从句原因状语从句用because(因为)，since(既然), as(由于)引导1、字母由多到少，语气由强到弱.2、由why提问必须用because回答.Since, as不回答why的提问，而且从句一般放在句首，because一般放在主句之后.3、 before of +名词Because of the rain, we didn' t go to the park.4、 because 和so不成连用，只能选其一.（还有although, but）Why didn' t he come to school? Because he was ill.Since I must die, I must. 既然我一定要死，我一定这样做.Since a lot of people make mistakes in life, Mr Smithwanted to give John a Chance.5、 for并列连词，不克不及放在句首，主要放在两个并列句之间.For所提供的来由为一个补偿说明，而且前面常有逗号隔开.The days we short, for it is December now.*改错 Because he is ill is the reason why he can' t come. (Because改为that)六、目标状语从句目标状语从句用so(常常使用于白话), that, so that, in order that引导目标状语从句的谓语常含有may, might, can, could, should, would等情态动词.1. We' ll sit never to the front so we can hear better.2. He studied hard so that he might succeed. 他尽力学习，以便成功.3. I' ll speak slowly so that you can take notes. 我渐渐讲，以便你们能做笔记.4. They hurried to the station in order that they could catch the train.他们急忙赶往火车站，以便能赶上火车.5.I took a taxi so that I could get thereearlier.6.I' m going to the lecture early so that I may get a good seat.我打算早些去听讲座，以便找个好座位.七、条件状语从句条件状语从句由if, unless, (so) as long as(只需)引导在条件状语从句中要用一般时暗示将来时（与时间状语从句相同）We will miss the train if you don' t hurry.He said we would miss the train if we didn' t hurry.You will fail the exam unless you study hard. (if you don' t study hard)He won' t come unless he is invited. (if he isn' t invited)Eat less food unless you want to become fatter. (if you don' t want to become better)As long as you are not afraid of difficulties, you are sure to succeed.As long as you don' t lose heart, you will succeed.八、成果状语从句成果状语从句由such…that, so….that, so that, that 引导1. such… that 的常常使用句型such +a/an +形容词+可数名词单数+thatsuch +形容词+可数名词单数+thatSuch+形容词+可数名词复数（不成数名词）+that注意so many (much, few, little) +名词，such a lot of (或lots of)+名词是惯用法，不成乱花.She is such a beautiful girl that we all like her.They were such beautiful flower that we bought home.It was such delicious food that they ate it up.2. so+形容词或副词+thatso+形容词+a/an+可数名词单数+thatHe is so rich that he can buy lot of things for himself.He works so hard that hedid everything well.It was so hot a day that we all went swimming.It was such a good day that we all went swimming.3.so that, that都可以引导成果状语从句He didn' t study hard, (so) that he failed the exam.4.too…to, enough…to 可以引导成果状语从句与so…that 替换，so…that 布局可以用too…to替换必须具有两个条件，一是主句和成果状语从句的主语必须一致，二是从句中的谓语部分必须含有can(could) not.She is young that she can' t go to school.She is too young to go to school.She isn' t old enough to go to school.九、让步状语从句although, thougheventhough = even if, whether…orhowever = no matter howwhatever = no matter whatwhoever = no matter whowhenever = no matter whenwherever = no matter where*although和though都暗示“虽然”只是although 更正式，多用于句首，而though 用于句中，二者都可与yet, still连用，但不与but 连用Although/Though they are poor, they often help others.They are poor, but they often help others.Although he has failed many times, he doesn' t give up trying.Whatever/No matter what you say, I won' t believe you.No matter what you say, I don' t care.No matter who you are, you must obey the rules of ourschool.However hard he tried, he failed again.No matter what the weather is like, you can always find surfers out riding the waves.十、方式状语从句方式状语从句由as(如同，依照)，as if (though)引导*as和like都有“像”的意思，as是连词，后面毗连句子，like是介词后面可加名词、代词或名词性短语.I did the work as others did. 相当于 I did like others.You must do as I do.as if(though)二者意义相同，从句谓语动词常常使用虚拟语气，但实现能够性较大，则用毗连词.It seems as if/though it' s going torain.They are talking as if/though they wereold friends.She treats me as if I were her brother.When you are in home, do as the Romans do.例 You must do ______ I told you.A. after B. before C. where D. as (D)The students must do______ the teacher told them.A. as B. before C. after D. if (A)十一、比较状语从句比较状语从句由as…as, not as(so)…as, than, the+比较级，the+比较级引导He swims as well as you. (do)He doesn' t swim as well as you (do).He got here earlier than you. (did)The busier he is, the happier he feels.英语语法状语从句类型综述状语从句主要用来修饰主句或主句的谓语.一般可分为九大类，分别暗示时间、地点、原因、目标、成果、条件、让步、比较和方式.虽然种类较多，但由于状语从句与汉语布局和用法相似，所以懂得和掌握它其实不难.状语从句的关键是要掌握引导分歧状语从句的常常使用毗连词和特殊的毗连词即考点.现分别罗列如下: 1．时间状语从句常常使用引导词：when, as, while, as soon as, while, before, after, since , till, until特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely … whenI didn’t realize how special my motherwas until I became an adult. While Johnwas watching TV, his wife was cooking. The children ran away from the orchard(果园) the moment they saw the guard. No sooner had Iarrived home than it began to rain. Every time I listen to your advice, I get into trouble.2．地点状语从句常常使用引导词：where特殊引导词：wherever, anywhere, everywhereGenerally, air will be heavily polluted where there are factories. Wherever you go, you should work hard.3．原因状语从句常常使用引导词：because, since, as, since特殊引导词：seeing that, now that, in that, considering that, given that, considering that, inasmuch as, insomuch asMy friends dislike me because I’m handsome and successful. Now thateverybody has come, let’s begin our conference. The higher income tax is harmful in that it may discourage people from trying to earn more. Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable.4．目标状语从句常常使用引导词：so that, in order that特殊引导词：lest, in case, for fear that，in the hope that, for the purpose that, to the end thatThe boss asked the secretary to hurry up with the letters so that he could sign them. The teacher raised his voice on purpose that the students in the back could hear more clearly.5．成果状语从句常常使用引导词：so … that, so… that, such … that, 特殊引导词：such that, to the degree that, to the extent that, to such a degree that,He got up so early that he caught thefirst bus. It’s such a good chance that we must not miss it. To such an degree was he excited that he couldn’t sleep last night.6．条件状语从句常常使用引导词：if, unless, 特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition thatWe’ll start our project if the president agrees. You will certainly succeed so long as you keep on trying. Provided that thereis no opposition, we shall hold the meeting here.7．让步状语从句常常使用引导词：though, although, even if, even though特殊引导词： as(用在让步状语从句中必须要倒装)，while ( 一般用在句首 )，no matter …， in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whicheverMuch as I respect him, I can’t agree to his proposal. 虽然我很尊敬他，我却分歧意他的建议. The old man always enjoys swimming even though the weather is rough. No matter how hard he tried, she could not change her mind. He won’t listen whatever you may say. 8．比较状语从句常常使用引导词：as(同级比较), than(分歧程度的比较)特殊引导词：the more … the more … ; just as …，so…; A is to B what /as X is to Y;no … more than; not A so much as B Sheis as bad-tempered as her mother. The house is three times as big as ours. The more you exercise, the healthier you will be. Food is to men what oil is to machine. 食物之于人，犹如油之于机器.9．方式状语从句常常使用引导词：as, as if, how 特殊引导词：the way When in Rome, do as the Roman do. She behaved as if she were the boss. Sometimes we teach our children the way our parents have taught us.。
状语从句的种类与用法详解
状语从句的种类与用法详解状语从句是英语语法中的重要部分，它在句子中充当状语，用于修饰、限定主句的动作、状态或其他方面。
状语从句有多种种类和用法，下面将对其进行详细解析。
1. 时间状语从句时间状语从句用于表示主句中的动作发生的时间，具体用法如下：- 当主句谓语动词表示延续性动作时，使用while引导的时间状语从句。
例如：While I was studying for the exam, my phone rang.（当我正在备考时，我的手机响了。
）- 当主句谓语动词表示瞬时性动作时，使用when或as引导的时间状语从句。
例如：When I arrived at the station, the train had already left.（当我到达车站时，火车已经开走了。
）2. 地点状语从句地点状语从句用于表示主句中的动作发生的地点，具体用法如下：- 使用where引导的地点状语从句。
例如：I will meet her where we had our first date.（我会在我们第一次约会的地方见她。
）3. 原因状语从句原因状语从句用于表示主句中的动作发生的原因，具体用法如下：- 使用because或since引导的原因状语从句。
例如：He couldn't come to the party because he had to work overtime.（他不能来参加聚会，因为他得加班。
）- 使用as引导的原因状语从句，强调两个动作同时发生。
例如：As the sun set, the sky turned orange.（太阳下山时，天空变成橙色。
）4. 条件状语从句条件状语从句用于表示主句中的动作发生的条件，具体用法如下：- 使用if或unless引导的条件状语从句。
例如：If it rains tomorrow, we will stay indoors.（如果明天下雨，我们将呆在室内。
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状语(adverbial)是句子的重要修饰成分。
状语是谓语里的另一个附加成分，它附加在谓语中心语的前面，从情况、时间、处所、方式、条件、对象、肯定、否定、范围和程度等方面对谓语中心进行修饰或限制。
在英语中，状语修饰动词、形容词、副词等的句子成分。
状语的功用：状语说明地点、时间、原因、目的、结果、条件、方向、程度、方式和伴随状况等。
状语一般由副词、介词短语、分词和分词短语、不定式或相当于副词的词或短语来担当。
其位置一般放在句末，但也可放在句首或句中。
副词是一种用来修饰动词，形容词，副词或全句的词，说明时间，地点，程度，方式等概念。
1.副词一般在句子中做状语.He speaks English very well. 他英语说得非常好.中的very是程度副词，用来修饰well。
very well是修饰speak的程度状语。
2.不定式在句子中可以作目的状语。
I come specially to see you. 我专门来看你.3.介词短语Ten years ago, She bega n to live in Dalia n.十年前，她开始住在大连。
The boy was praised for his bravery.4.从句作状语When she was 12 years old, she bega n to live in Dalia n.If I am not busy tomorrow, I will play football with you.5.分词作状语Havi ng had a quarrel with his wife, he left home in a bad temper 。
In hibited in one direct ion, it now seems that the Mississippi is about to take ano ther.状语简介概述状语与定语相同的地方是，都是前者附加成分；不同的地方是，它是谓语里的附加成分，而定语是主语或宾语里的附加成分.从句子的层次上看，状语是在第二个层次和第三个层次里的成分，有时甚至是更低层次的成分.状语的构成状语的构成经常充当状语的有形容词，副词，时间处所名词，能愿动词，指示代词，以及方位短语，介词短语，动宾短语，谓词性联合短语，谓词性偏正短语，谓词性主谓短语等•含有动量词的数量短语以及重叠式的数量短语（不论动量，物量）也可以充当状语•此外,少数名词带上表比况的助词也可以作状语•状语的书面标志一一”地”状语的书面标志是结构助词"地".状语后面带或者是不带"地"，情况比较复杂•一般讲来，数量短语，主谓短语，动宾短语等作状语时，大都带"地”;而介词短语，方位短语，能愿动词，时间处所名词作状语时不能带哋"，副词，单音节形容词作状语一般也不带"地".多层状语如果一个中心语前面有好几个状语（多层状语），那就应当注意它们的语序.多层状语的状语个数一般比多层定语的定语个数要少些，其语序也比多层定语的语序要灵活一些•多层状语的一般语序：a.表时间的名词或方位短语，介词短语；b.副词.c•表处所的介词短语或名词，方位短语；d.表情态的形容词或谓词短语；e.表对象的介词短语.其中副词的位置较为灵活，也可放置在第三项之后.一般状语和句首状语状语在句子中有两种位置：一种是在主语之后，谓语中心之前，如上文所举各例，这是状语的一般位置；另一种是放在主语的前面的，这是状语的特殊位置，这种状语可称"句首状语".状语的分类状语按其修饰的功能不同可分为八大类：时间状语，地点状语，条件状语，原因状语，目的状语，结果状语，让步状语和比较状语时间状语从句要点：时间状语从句，由以下连词引导：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。
1.when当.....的时候Mozart started writi ng music whe n he was four years old.2.while 当.....时He visited a lot of places while he was traveli ng.3.as 在.....的同时；一边....一边.....He smiled as he stood up.4.after 在....之后He left the classroom after he had fini shed his homework the other day.5.before 在... 之前Mr. Brow n had worked in a bank for a year before he came here.6.as soon as 一.....就（scarcely/hardly...when,no sooner than,themi nute/mome nt,on/upo n, directly 等等）We bega n to work as soon as we got there.I will write to you as soon as I get home.7.si nee 自... 以来到现在表示自过去的一个起点时间到目前（说话时间）为止的一段持续时间。
主句一般用现在完成时，从句用一般过去时。
Mr Green has taught in that school since he came to China three years ago.（还可以用作介词，本句从句还可以用短语：since three years ago（自三年前以来）表示。
）8 till /un til都可以作连词，连接时间状语，也可以作介词，与其它词构成介词短语，在句中作状语。
They walked till /un til it was dark.Xiao Ming didn ' t leave home till / until his father came back.9. by the time 到 .... 为止（所在句子的主句应用现在或过去完成时）By the time he gets there , his father has already gone.By the time I got to school, the class had already began.一.由when, while, as引导的时间状语从句。
例如：When you thi nk you know nothing, the n you beg in to know someth ing. 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 un der the ground it grows, it chokes, it gathers such an explosive force that on the day it bursts out , it blows up everythi ng 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。
Will you watch my clothes while I have a swim. 我游泳的时候，请你照看一下我的衣服。
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。
a .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”。
When she came in, I was eat in g.（瞬时动词）When I lived in the coun tryside, I used to carry some water for him. （延续性的动词）While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。
并且while有时还可以表示对比。
例如：While my wife was readi ng the n ewspaper, I was watch ing TV. （was readi ng 是延续性的动词，was reading 禾口was watching 同时发生）I like play ing football while you like play ing basketball. （对比）b,As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。
例如：We always sing as we walk. （as表示“一边.. 一边”）As we was going out, it began to snow. （as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间）c,as whe n while 的辨析as when while 都表示主、从句动作同时发生，三者差异如下：表示“一边。
一边"的意思as强调两个动作同时进行，并表示对比时用于发生时间较段时d when1、还可以表示从句动词的动作在主几句动词的动作"之前"或"之后"发生。
2、when=and then; at that moment （正在那个时候）3、常用于常见搭配中e while1、用于时间较长时2、强调两个动作同时进行，并表示对比时有时这三个连词可以互换，有时不可以。
lt was raining hard when （as） I got there.（动作同时发生，when 可换为as,但不能换为while，因为get是点动词.）When I had read the article, he called me.（从句动作发生在主句之前，注意时态表达，只能用when ）When I got to the cin ema, the film had begu n.（从句的动作发生在主句之后，只能用when,并要注意时态）He was about to leave, whe n the teleph one ran g.（此时不能放在句首。