高中英语语法系列：状语从句

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.。

状语从句状语从句是一种副词性从句，通常由一个从属连词或一个起连词作用的词组引导。

状语从句1. 时间状语从句常见的连词(组)：when, while, as, before, after, once, till, until, as soon as, now that, hardly ...when, scarcely ...when, no sooner ...than等。

可以引导时间状语从句的副（介）词（短语）或名词短语：directly, instantly, immediately, by the time, the moment, the second, the minute, the instant, every time, each time, next time, the last time等。

注意点如下：(1) when, while, as引导的时间状语从句as表示“当……的时候”，往往和when/ while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。

when(at or during the time)既可以表示在某一点的时候，又可以表示在某一段时间内，主句与从句的动作或事情可以同时发生也可以先后发生。

while强调一段时间，仅表示从句和主句的动作同时发生，并且有延续意义，该从句中的动词一般要用延续性动词，从句中常用过去进行时态或一般过去时态；当when表示a period of time时，两者可以互换。

She came up as I was cooking.(同时)在我做饭时，她走了过来。

When we were at school, we went to the library every day.(在一段时间内)当我们在学校时，每天都去图书馆。

While they were watching TV, I was preparing myself for the coming examination.他们在看电视，而我在为即将到来的考试做准备。

语法专项2——状语从句【状语从句综述】由从句担任的状语，在句子中可修饰谓语（或其它动词）、形容词、副词或是整个句子，它可以用来表示时间、地点、原因、目的、结果、条件、方式、比较、让步等。

一、时间状语从句1.表示时间的状语从句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。

例如：When I came into the office, the teachers were having a meeting.当我进入办公室时，老师们正在开会。

He started as soon as he received the news. 他已得到这个消息，就出发了。

Once you see him, you will never forget him.一旦你见了他，你就不会忘记他。

No sooner had I gone to bed than I went to sleep.我一上床就睡着了。

2.when, while, as的区别这三个词都可以用作连接词，表示时间关系，但有所区别。

(1)when表示时间关系时，意思常常是“当(在)……的时候”。

主句和从句中的动作或事情可以同时发生，也可以先后发生。

例如：When we were at school, we went to the library every day.我们在求学的时候，每天都到图书馆去。

(2)while 用作连接词表示时间关系时，意思也是“当(在)……的时候”，主句中的动作或事情在从句中的动作或事情的进展过程中发生。

它有时可与when通用，但它只能指一段时间(a period of time)，而不能指一点时间的(a point of time)。

状语从句状语从句一什么是状语从句二状语从句位置三状语从句分类四特殊句式五状语从句常见考点六练一练一什么是状语从句状语从句是行使状语功能的从句，因为其作用相当于副词，它可以用来修饰谓语、定语、状语或整个句子。

状语从句通常由一个连接词或起连接词作用的词组引导。

二状语从句位置比较灵活，有时可以放于句首，有时可以置于句末。

状语从句位于句首时，其后常用逗号与后面的句子隔开。

三状语从句分类状语分类常用连接词例句时间状语after,before,when,while,whenever,as soonas,the moment,as,since,until,the minute,the second,immediately,directly,instantly The ball goes up very high after it hits the ground.Wait until you’re called.地点状语where,wherever You can take a walk wherever you liketo.原因状语Because,as,since,now that,seeing(that)considering(that),Since you do not understand,I will explain again.结果状语so that,such that He is so young that he can’t go to work.目的状语so that,in order that Speak clearly so that they mayunderstand you.条件状语if，unless,as(so)long as,once,unless,on condition that，in case He will do anything as long as it is interesting.让步状语though,although,even though,whilewhether，whoever/no matterwho，whatever/no matter what，whenever/ no matter Even though you say so,I do not believe it.比较状语than as…as，the more…the more The more I see him,the less I like him.方式状语as,as if,as though He told me everything as if I were hisbest friend.四特殊句式1时间状语中A:It+be+时间点+when……当某事发生时是什么时候It was11:00PM when he came back last night.B:It is/has been+时间段+since……自从某事发生后已过了多久时间It is/has been two years since I entered the the senior school.C:It+be+时间段+before……在某事发生之前需要多久时间It was8years before we finally drove away the Japanese invaders.It might be a long time before Chinese land on the moon.2让步状语从句A:as引导的让步状语从句，从句的表语、状语必须前置到句首。

高考英语语法复习：八种状语从句的用法状语从句状语从句有时间、地点、原因、目的、方式、结果、条件、让步等八种。

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 of，no sooner…than(一…就)，hardly…when(一…就).例如：Each/Every time he comes here,he will drop in on me.每次他来这儿他都顺便看我.He was ill last time I saw him.上次我见到他时他病了.No sooner had she heard the news than she cried.她一听到这个消息就哭了.[辨析]when与whilewhen引导的从句动词可以是延续性的或短暂性的，while引导的从句中动词必须是延续性的;在“be…when…”句式中when表“at that time(就在这时)”意，这样用的when不能换为while;while有时并不表示时间，而表示对比，意“而”、“却”，when无这样的用法。

例如：When I got home I found the door locked./While(或When)we were working in the fields,it suddenly began to rain./He was wandering through the streets when a bike hit him./His pencil is red,while mine is yellow.[辨析]till与until一般情况下可以互换，但until可以位于句首，till则不能。

语法复习六：状语从句由从句担任的状语，在句⼦中可修饰谓语（或其它动词）、形容词、副词或是整个句⼦，它可以⽤来表⽰时间、地点、原因、⽬的、结果、条件、⽅式、⽐较、让步等。

状语从句是⼀较⼤的语法项⽬，也是近⼏年⾼考题中常见的⼀个重要试点。

⾼考中已考查了时间、让步、地点、条件、⽬的等状语从句，这些从句仍是今后⾼考热点，应作充分准备。

同时对⽅式状语从句也应引起重视。

（⼀）时间状语从句表⽰时间的状语从句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。

e.g. When I came into the office, the teachers were having a meeting.He started as soon as he received the news.Once you see him, you will never forget him.No sooner had I gone to bed than I went to sleep.（⼆）原因状语从句原因状语从句是表⽰原因或理由的，引导这类从句的最常⽤的连词是because, since, as , now that（既然）等，for 表⽰因果关系时（它引导的不是从句）为并列连词，语⽓不如because强。

e.g. He is disappointed because he didn't get the position.As it is raining, I will not go out.Now that you mention it, I do remember.（三）地点状语从句引导地点状语从句的连词是where 和wherever等。

状语从句那你帮小新造个英文句子吧~~~上面这个句子有什么特点吗？一、状语从句的概念用来修饰主句中的动词，副词和形容词的从句叫状语从句。

时间状语从句地点状语从句条件状语从句目的状语从句状语从句分类原因状语从句结果状语从句方式状语从句比较状语从句让步状语从句1. 时间状语从句4. 只能用as的情况1) as表示“随着……”之意时；2) as表示“一边……一边……”时；3)当表示主从句两个短暂性动作同时发生时。

5. 表示“一……就……”的连词或短语1) as soon as，当主句是一般将来时，从句必须用一般现在时表示将来。

2)在hardly.when/ scarcely.when/ no sooner.than结构中，当hardly/ scarcely／no sooner 放在句首时，主句必须用倒装语序；主句的时态须用过去完成时，从句须用一般过去时。

3) the moment，the minute，the second，the instance后直接接从句。

4) immediately，instantly后直接接从句。

6. every morning，every evening，every time，every day，every year（每……）后直接接从句。

7. “it was+时间点+when从句”it指时间点，时间前无介词，when从句是状语从句；当主句是一般将来时，when 从句用一般现在时。

8. before1)…before.表示“没有来得及做某事就……”，主句经常用过去完成时，从句用一般过去时。

2)“it was(not)十一段时间+before从句（一般过去时）”主句是肯定句时，意为“过多长时间才……”；主句是否定句时，意为“没过多久就……”。

3)“it will be(not)十一段时间十before从句（一般现在时）”主句是一般将来时，从句要用一般现在时表示将来。

9. until1)(not)…until…一肯定句中主句的谓语动词必须是延续性动词；否定句中主句的谓语动词经常是非延续性动词，也可以是延续性动词。

高中英语语法：状语从句知识点状语从句(adverbial clause)在句中作状语，可修饰主句中的动词、形容词和副词等。

状语从句由从属连词引导。

状语从句可放在句首或句末。

放在句首时，从句后面常用逗号；放在句末时，从句前面往往不用逗号。

状语从句根据它们的含义分为时间、地点、原因、目的、结果、方式、让步、条件、比较等九种。

一、时间状语从句1、while, when, whenever和as的用法比较（1）while常表示一段较长的时间或一个过程，强调主句的动词和从句的动词所表示的动作或状态是同时发生的。

它不能表示一时性或短暂的动作。

Don't talk so loud while( as) others are working.别人工作时，请勿大声说话。

（2）when引导的时间状语从句，可指时间的一点，也可以指一段时间，从句的谓语动词可用终止性动词，也可用持续性动词。

when引导的从句表示的具体的时间，从句的动作和主句的动作可以同时，也可以先于主句的动作。

Whenever指任何一个不具体的时间。

It was raining when we arrived. 我们到达时，天正下着雨。

（动作同时，指时间点）When you read the poem a second time, the meaning will become clearer to you.当你再读一遍这首诗，你就更清晰它的含意。

（动作有先后，指时间点，不能用while）Come whenever you like. 你爱什么时候来就什么时候来。

（3）as用as时主句和从句的动作往往同时发生，具有延伸意义，一般同延续性动词连用，有时可译作“一边…一边…”。

As time went on, his theory proved to be correct.随着时间的推移，他的理论被证明是正确的。

As（when）he finished the speech, the audience burst into applause.他讲话结束的时候，听众掌声雷动。

高中英语语法状语从句一、基本概念状语(副词性)副词 动词/句子（形容词/其它副词）介词短语、动词不定式、分词短语、形容词、状语从句分类时间、地点、原因、目的、结果、条件、让步、比较、方式二、分论（一）时间状语从句(1) when 引导的时间状语从句①when 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 students 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。

(2) as引导的时间状语从句as引导的时间状语从句其动词的动作是延续性的，而且侧重表示主句和从句的动作交替或同时发生，译为“一边……，一边……”或“随着……”We were having breakfast as she was combing her hair.她梳头时我们在吃早饭。

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，有时修饰整个主句。

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分为时间、条件、原因、让步、目的、结果、方式、比较、地点等9种。

1. 时间状语从句时间状语从句可放在句首、句中或句尾。

常用when，while，as，after，before，since，until，once，as soon as，the minute / moment“一……就……”，hardly … when，no sooner …than“刚……就……”等连接词引导。

○1连词when，while，as都表示“当……的时候”，但是when引导的从句的动作和主句的动作可以同时发生，也可以先后发生；用as，while时则强调主句和从句的动作同时发生。

如While I was reading, he came in.As he walked along the street, he sang happily.但当从句表示“随时间推移”时，只能用连词as，不能用when或while。

如As time goes on, I like to speak English more and more.○2从属连词as soon as，immediately，directly，the moment，the minute，no sooner … than …，hardly / scarcely … when …，once引导的从句都表示从句的动作一发生，主句的动作随即就发生，意为“一……就……”，从句中用一般时态代替将来时态。

如Once you remember it, you’ll never forget it.The moment I heard the voice, I knew father was coming.No sooner had we arrived at the station than the train left.温馨提示：as soon as，the moment引导的从句表示“一……就……”；no sooner … than …，hardly … when引导的从句表示“刚……就……”。

高中英语语法：状语从句篇一、时间状语从句1、when的用法（1）when既可引导一个持续性动作，也可引导一个短暂性动作，可用于表示主句和从句动作同时发生或从句动作先于主句动作，有时还可表示从句动作后于主句，意为“当。

时候”。

（2）when在be about to do......when......，be doing.....when.....，had done。

when。

，be on one’s way。

when。

，be on the point of doing。

when。

等结构中，作“那时突然”讲。

（3）when “既然、鉴于；尽管，虽然（位于主句之后）；如果”2、while的用法（1）表示“当。

时候”，引导的动作必须是延续性的。

（2）用作并列连词，表示相对关系“然而”。

（3）引导让步状语从句，相当于although,意为“虽然”，位于主句前。

（4）引导条件状语从句，相当于as/so long as，意为“只要”。

3、as 的用法（1）表示“当。

时候”，强调同时发生，不指先后。

（2）说明两种正在发展或变化的情况，表示“随着”，表示时间的推移。

（4）强调两个动作紧接着发生。

（5）表示“虽然，尽管”。

（6）其他含义“正如，正像”，“作为”，“由于，因为”。

4、before的用法（1）一般意为“在。

之前”“。

才”，“。

就”“还没有。

”“免得”“不知不觉”“宁可，宁愿”，“否则，要不然”。

（2）It + will be/was + 时间段+before+一般现在时/一般过去时。

在肯定句中，意为“多长时间之后才”；在否定句中，意为“用不了多长时间就”。

5、until和till（1）与肯定句连用，必须是延续性动词。

（2）与否定句连用，必须是非延续性动词，表示“直到。

才，在。

之前不。

”。

注意：not until可用于强调句和倒装句强调句：It is/was not until…that…倒装句：not until 放句首时，主句要部分倒装。

状语从句一．分类：adv.+that（如此……以致）so that（结果……）such+n.+that（如果……以致）that（所以，因此）让步状语从句：though/although不可同but连用。

though/although （虽然）however （可是）even though/if（即使）no matter+what/which/where/who/when =whatever/whichever/wherever/whoever/whenever.（不论什么/哪一个/哪里/谁/何时）比较状语从句：as （正如）as…as（和……一样）not as/so … as （不如……）than（比……更）the+比较级…+the+比较级（越……越……）条件状语从句：if（假设）unless（如果不）so long as（只要）on condition that （如果）方式状语从句：as（像……那样地）just as（正像）as if（好像）as though（好像）二．各种状语从句的简化方法：1作状语。

%例：After she sang，she left the rich man's house．= After singing，she left the rich man's house．2．以as soon as引导的状语从句的主语若与主句主语一致时，从句等于on+doing sth.,作状语，此时的动词为非延续性动词。

例：Mary began to operate on the wounded soldiers as soon as he arrived at the village．= Mary began to operate on the wounded soldiers on arriving at the village．3．时间状语从句和条件状语从句的主语和主句主语一致时，有时可简化为不定式作状语。

状语从句The Examples of Adverbial Clauses状语从句一、时间状语从句when, while, as, whenever, till, until, after, before, since, once, every/each time, the day一...就...1.As soon as2.The moment/minute/second/instant3.Immediately/instantly/directly4.No sooner...than... hardly/scarcely...when...Than/when 后采用一般过去时，主句采用过去完成时，主倒从不倒。

(adv./prep.位于句首，部分倒装）1.when, while, aswhen用法最广，常可代替while和as, as引导的时间状语从句既可以是延续性动词，又可以是非延续性动词；而while所引导的时间状语从句谓语动词只能是延续性动词，并常与进行时态连用。

1). When I lived in the countryside, I used to carry some water for him.2). While my wife was reading the newspaper, I was watching TV.3). As we were going out, it began to snow.when一般强调特定时间，还可表示:1.就在这时/就在那时突然...2.还没...就...3.一...就...4). When spring came, he felt like a trip.5). We were about to to leave when he came in.6). I had hardly sat down when he stepped in.=Hardly had I sat down when he stepped in.While所引导的时间状语从句强调主句和从句的动作同时发生或相对应，也表示对比。

第六讲高中英语语法状语从句状语从句分为时间、地点、原因、目的、结果、条件、方式、让步、比较状语从句。

一. 时间状语从句：when( ever ) / while / as / before / after / ( ever ) since / once / until / till /as long as / no sooner …than / hardly…when…/ by the time/ n.短语1. when / while / as(1) while从句只能为持续性动词，而when / as从句用持续性动词和非持续性动词均可。

e.g. Sorry, I was out when you called me.While he was sleeping, the spaceship circled the earth twice.The telephone rang while I was taking a bath.(2) when从句的谓语动词可以发生在主句之前、之后或同时发生；while / as从句的谓语动词必须与主句谓语同时发生。

e.g. When the meal was finished, Rachel washed up and made coffee.When I got to the airport, the guest had left.While she was making a phone call, I was writing.(3) 当两个时间延续的动作同时发生而又具有对比意义时用while,主从句的时态常相同。

e.g. Would you look after the children while I do the shopping?While I was playing the piano, my sister was doing her homework.While she was asleep, thieves broke in and stole her handbag.(4) 当主从句动作同时发生，从句动作的时间概念淡化，而主要表示主句发生动作的背景和条件时，只能用as “一边…一边…，随着”。