【英语】状语从句知识点总结经典

初中英语状语从句归纳(附练习及答案)

状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词（从属连词）引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。 一、时间状语从句 要点: 时间状语从句，由以下连词引导： whe n while as after before as soon as since till /un til 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. whe n当。。。的时候 mozart started writing music when he was four years old. （当）莫扎特的时候，开始写音乐作品。 2. while 当。。。时 he visited a lot of places while he was traveling. 他在旅途中参观了许多地方。 3. as在。。。的同时；一边。。。一边。。。 he smiled as he stood up. 他一边站起来一边笑着。 4. after 在。。。之后 he left the classroom after he had finished his homework the other day. 前几天做完作业之后回的家

5.before 在。。之前 mr. brown had worked in a bank for a year before he came here. 布朗先生来这之前已经在一家银行里工作一年了。 6. as soon as o。。就。。。 we began to work as soon as we got there. 我们一到那就开始工作。 i will write to you as soon as i get home. 我一到家就给你写信。 7. since 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. 自格林先生来中国以来，他就在这所学校教书。 （还可以用作介词，本句从句还可以用短语：si nee three years ago自三年前以 来）表示。） 8 till /until 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 /until it was dark. 他们一直走到天黑 xiao ming didn 't leave home till /iluhnits father came back.

中考复习专题状语从句知识点总结及经典习题(含答案)

中考复习专题状语从句知识点总结及经典习题(含答案) 一、初中英语状语从句 1． the journey was tiring，Jeff thought it was worth both the time and the money. A．As B．Since C．Unless D．Although 【答案】D 【解析】 【详解】 句意：虽然旅途很累，杰夫认为时间和金钱都值得。 A. As当……的时候； B. Since 自从； C. Unless除非； D. Although尽管。根据下文Jeff thought it was worth both the time and the money.可知上文是让步状语从句，这里用Although引导。根据题意，故选D。 2．--- I wonder if Tina to China next week. --- If it ，she will come. A．will come；won’t rain B．comes；doesn’t rain C．comes；won’t rain D．will come；doe sn’t rain 【答案】D 【解析】 【详解】 句意：——我想知道蒂娜下周是否会来中国。——如果不下雨，她就会来。根据语境推测对话的语境是“——我想知道蒂娜下周是否会来中国。——如果不下雨，她就会来。”，第一个设空处的if意思是“是否”，引导宾语从句，主句是一般现在时，从句根据时间状语next week确定用一般将来时，一般将来时的构成是：主语+will+动词原形，排除B/C；第二个设空处考查含有if引导的条件状语从句中主句的时态，在含有条件状语从句中的复合句中，时态遵循“主将从现”的原则，即：主句用一般将来时，从句使用一般现在时表将来，表示“不下雨”应借助于助动词does，故选D。 3．You are sure to fail the exam ________ you study hard. A．if B．unless C．since D．that 【答案】B 【解析】 试题分析：句意：如果你不努力学习，你一定会考试不及格的。A.if如果；B. unless如果不；C. since自从；结合句意，故选B。 考点：考查连词的用法。 4．--Where is the comic book? --I brought it to you ________you were in the reading room yesterday. A．when B．if C．because D．before 【答案】A

高中英语状语从句讲解汇总

高中英语状语从句讲解汇总 原因从句 除了下面A2，A3中所示各种类型外，这两种从句均可由as或because来引导。但是用as引导原因从句较为稳妥（参见A）；用because引导结果／原因从句较为稳妥（参见B）。 A 原因从句 1 由as／because／since 引导的原因从句： We camped there as／because／since it was too dark to go on． 我们在那里露宿是因为天太黑，不能再继续往前走了。 As／Because／Since it was too dark to go on，we camped there． [ 因为天太黑不能再继续往前走，我们就在那儿露宿了。 2 in view of the fact that可用as／since／seeing that来表示，但不能用because： As／Since／Seeing that you are here，you may as well give me a hand． 既然你在这儿，你就帮我个忙吧。 As／Since／Seeing that Tom knows French，he’d better do the talking． 既然汤姆懂法语，最好让他来谈。 3 在as／since／seeing that意指以前共知的或共知的陈述时，可用if来代替： ~ As／Since／Seeing that／If you don’t like Bill，why did you invite him 既然／如果你不喜欢比尔，你为什么邀请了他 注意：if so的用法： —I hope Bill won’t come． —If so（＝If you hope he won’t come），why did you invite him —我希望比尔别来。 —如果这样（=如果你希望他不来），你为什么邀请了他 关于if＋so／not，参见第347节。 ~ B 结果从句由because或as引导： The fuse blew because we had overloaded the circuit． 保险丝烧断了，因为我们使线路超载了。 He was angry because we were late． 他生气是因为我们来晚了。 As it froze hard that night there was ice everywhere next day． 因为那天晚上冷得厉害，所以第二天到处都是冰。 ~ As the soup was very salty we were thirsty afterwards． 因为这汤很咸，后来我们渴得厉害。

【英语】状语从句知识点总结

【英语】状语从句知识点总结 一、初中英语状语从句 1．---Can students go online during lessons? ---They can’t ________ it is for that lesson. A．if B．unless C．until D．while 【答案】B 【解析】 【详解】 句意：——学生上课时能上网吗？他们不可以，除非为了上那堂课。本题考查连词辨析，A.如果；B.除非；C.直到；D.当……时候。答语是条件状语从句，根据句意结构可知，需要unless连接，故选B。 2．Tony has had to cook by himself ________ his mother went on business to Guangzhou. A．since B．after C．during D．when 【答案】A 【解析】 【详解】 句意：自从妈妈去广州出差以来，托尼不得不自己做饭。A. since从……以来；B. after在……之后；C. during 在……期间；D. when当……时候。since后跟时间状语从句时，表示的是到目前为止的时间段，从句时态为一般过去时，而主句的时态为现在完成时，故正确答案为A。 3．—____ the workers are very tired, _____they keep on working. — They are great. We must learn from them. A．Because; / B．Though; / C．Because; so D．Though; but 【答案】B 【解析】 试题分析：句意：尽管工人们很累了，但他们仍然继续工作。——他们太伟大了，我们应该向他们学习。本题考查连词的用法。Because用于表示因果关系，不能与so同时使用；Though用于表示转折关系，不能与but同时使用。结合句意，故选B. 考点：考查连词的用法。 4．Chen Wei isn’t at school today ________ he is taking a robot competition in Shanghai. A．so B．because C．before D．if

中考英语状语从句归纳

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。 当。。。的时候 mozart started writing music when he was four years old. (当)莫扎特的时候，开始写音乐作品。 当。。。时 he visited a lot of places while he was traveling.他在旅途中参观了许多地方。 在。。。的同时；一边。。。一边。。。 he smiled as he stood up.他一边站起来一边笑着。 在。。。之后 he left the classroom after he had finished his homework the other day. 前几天做完作业之后回的家。 在。。。之前 mr. brown had worked in a bank for a year before he came here. 布朗先生来这之前已经在一家银行里工作一年了。 soon as 一。。。就。。。(主将从现) we began to work as soon as we got there.我们一到那就开始工作。 i will write to you as soon as i get home.我一到家就给你写信。 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. 自格林先生来中国以来，他就在这所学校教书。 (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 /until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 /until it was dark.他们一直走到天黑。 xiao ming didn’t leave home till / until his father came back.小明直到他爸爸回来才离开家。 9. by the time 到。。。为止 (所在句子的主句应用完成时) by the time he gets there , his father has already gone.他到家的时候，他爸爸已经走了。 by the time i got to school, the class had already began.我到校时，已经开始上课了。 难点——as when 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： as 表示“一边。。。一边＂的意思 强调两个动作同时进行，并表示对比时 when 1、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)

高中英语状语从句100题

状语从句暑假练习一 1.___ hard he tries, he never seems able to do the work successfully. A. Whatever B. However C. Whichever D. Whenever 2.We have to be patient. It will be some time ___ we get the full result. A. since B. that C. before D. after 3.She lied to us ___ she had to ___ a job. A. what; to get B. because; get C. because; in order get D. all; get 4.I was about to go out ___ the telephone rang. A. then B. when C. suddenly D. so 5.This equipment is so old ___ it can’t be used any more ___ some o f its parts are changed. A. as; unless B. that; unless C. that; if D. whether; or 6.I’ll tell you the result of the test ___ I know it. A. because B. the moment C. though D. for 7.You can’t go out to play ___ you finish your homework. A. if B. because C. unless D. when 8.I was late today ___ there was something wrong with my bike. A. since B. as long as C. because D. when 9.You can’t waste natural resources ___ you have much of them. A. as if B. even if C. when D. if 10.Please speak clearly ___ we can follow you. A. s o…that B. so C. so as to D. so that 11.___ you have made a decision, don’t change it frequently. A. Once B. Before C. While D. Even if 12.He used to tell children the story ___ he had had the experience. A. as though B. even if C. even though D. like 13.He came to help us ___ he had plenty of work to do. A. as B. while C. although D. whenever 14.___, he knows how to live and study. A. A child as he is B. As he is a child C. Child as he is D. Though he is child 15.We found people friendly ___ we went. A. to which B. in which C. wherever D. to where 16.___ the weather is fine, I’ll open all the windows. A. Now that B. Since that C. Because of D. For 17.It was ___ he couldn’t finish it by himself. A. so difficult a work as B. such a difficult work as C. so difficult work as D. such difficult work that 18.___ I know, this book will be used as a text book. A. So far as B. So far C. So long as D. As to 19.He had disappeared in the darkness ___ I saw who he was. A. before B. after C. till D. while 20.We’ll build a power station ___ water resour ces are plentiful. A. where B. in which C. which D. that 21.___ we don’t lose heart, we’ll find a way to overcome the difficulty.

状语从句知识点讲解.

状语从句 一. 时间状语从句 常用引导词:when, as, while, as soon as, 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 … when I didn’t realize how special my mother was until I became an adult. While John was watching TV, his wife was cooking. The children ran away from the orchard(果园 , the moment they saw the guard. (一 . when, while和 as 的区别 (1 when 引导的从句的谓语动词可以是延续性的动词, 又可以是瞬间动词。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。 (瞬间动词 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 引导的从句的谓语动词必须是延续性的, 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 reading the newspaper, I was watching TV. (was reading是延续性的动词, was reading和 was watching同时发生 (3 6. when 和 while 都可表示“当 ..... 时.... ” “这时候..... ” when 后及短暂性动词 (land , come in , meet , leave 等 , while 后及延续性动词(shop , visit , read , sleep 等 when 后接一般过去式。

初中英语状语从句知识点总结

初中英语状语从句知识点总结（一） 用来修饰主句中的动词，形容词或副词等而充当状语的从句叫做状语从句。状语从句常用从属连词来引导，与主句连接起来。若置于句末，则前面不加逗号。根据意义和作用，状语从句可分为时间原因条件等几种。下面我们就来分析一下这几种状语从句。 1时间状语从句 时间状语从句常用从属连词when,after,until,as soon as,等来引导。 当主句是祈使句或谓语动词是一般将来时态或情态动词时，其时间状语从句中的谓语动词常用一般现在时态表示将来发生的动作或存在的状态。这就是我们常说的“主将从现”。 如：Please call me when you get there.当你到那时，请给我打个电话。 I will write to you as soon as I arrive in Beijing.我一到北京就给你写信。 <温馨提示>since引导时间状语从句表示“自从…以来”，从句中的动词一般表示动作的起点，用过去时;而主句的动作延续的情况则用一般现在时或现在完成时。常用的句型为： It has been/is+一段时间+since+过去时。 如：I has been/is three years since we met last time.自从我们上次见面，已经三年了。 2条件状语从句 引导条件状语从句的连词或词组有：if(如果),unless(除非),as long as(只要)等。如果主句是将来时，条件状语从句也用一般现在时来表示。 如：I will stay at home if it rains tomorrow.如果明天下雨，我就待在家。 You can’t learn English well unless you wo rk hard. 除非你努力学习，否则是学不好英语的。 <温馨提示>由if引导的条件状语从句，若从句表达的是与现在事实相反的事实，则常用虚拟语气，即用过去时态表示(如果涉及到be动词，一律都用were)。此时，主句则用过去将来时。

状语从句知识点总结和题型总结

状语从句知识点总结和题型总结 一、初中英语状语从句 1．—Have you heard of the latest news about WIFI? —Yes. When the 5G age , the Internet speed will be 100 times as high as 4G. A．come B．comes C．will come D．is coming 【答案】B 【解析】 【详解】 句意：——你听说过无线网络的最新消息吗？——是的。到了5G时代，网速将是4G的100倍。A. come动词原形； B. comes第三人称单数形式； C. will come一般将来时态； D. is coming现在进行时态，此句是when引导的时间状语从句，遵循主将从现的原则，此空应填谓语动词的第三人称单数形式，此空故填comes。 2．The Italian woman didn’t feel a culture shock____it was her first time to Shanghai. A．though B．since C．if D．when 【答案】A 【解析】 句意：这个意大利妇女没有感到一种文化冲击，尽管她是第一次来上海。A. though尽管； B. since自从； C. if 是否，如果； D. when当---时候；根据The Italian woman didn’t feel a culture shock这个意大利妇女没有感到一种文化冲击，和it was her first time to Shanghai.她是第一次来上海之间用though 引导让步关系状语从句；故选A 3．___________ she couldn’t see his face, she could tell by his voice that he was young. A．Unless B．If C．Because D．Though 【答案】D 【解析】 【详解】 句意：虽然她看不见他的脸，但是她能够通过声音分辨出他很年轻。A. Unless除非；B. If 如果；C. Because因为；D. Though尽管。根据语境以及上下文，本题考查的是连词的用法。结合句意可知，在这里两个句子之间存在一个相反的让步关系，though/although/even though"虽然；尽管"，引导让步状语从句，符合句意。故答案选D。 4．— What were you doing ______ I knocked at the door? — I was sleeping. A．unless B．once C．when D．while 【答案】C 【解析】

状语从句知识点(大全)经典

状语从句知识点(大全)经典 一、初中英语状语从句 1．—Have you heard of the latest news about WIFI? —Yes. When the 5G age , the Internet speed will be 100 times as high as 4G. A．come B．comes C．will come D．is coming 【答案】B 【解析】 【详解】 句意：——你听说过无线网络的最新消息吗？——是的。到了5G时代，网速将是4G的100倍。A. come动词原形； B. comes第三人称单数形式； C. will come一般将来时态； D. is coming现在进行时态，此句是when引导的时间状语从句，遵循主将从现的原则，此空应填谓语动词的第三人称单数形式，此空故填comes。 2．Tony has had to cook by himself ________ his mother went on business to Guangzhou. A．since B．after C．during D．when 【答案】A 【解析】 【详解】 句意：自从妈妈去广州出差以来，托尼不得不自己做饭。A. since从……以来；B. after在……之后；C. during 在……期间；D. when当……时候。since后跟时间状语从句时，表示的是到目前为止的时间段，从句时态为一般过去时，而主句的时态为现在完成时，故正确答案为A。 3．I didn't realize he was a famous scientist you told me. A．until B．because C．since 【答案】A 【解析】 句意：直到你告诉我，我才知道他是一位出名的科学家。A. until到…为止；B. because 因为；C. since既然，因为。本题考查固定句式not…until…直到……才。其用法是如果（主）句中的谓语是终止性动词，应采用“not…until”结构，意为“到……时候才” 根据句子结构，结合选项，故选A。 4．________it’s Sunday tomorrow, we have to go to school. A．Though B．Since C．As D．Because

外研版英语【初中英语】状语从句知识点总结

外研版英语【初中英语】状语从句知识点总结 一、初中英语状语从句 1．I think you’ll miss the train ________ you hurry up. A．if B．and C．unless 【答案】C 【解析】 【详解】 句意“除非你快点，否则你将错过这个火车”。A.如果（引导条件状语从句）；B.和（表示并列）；C.除非（引导条件状语从句）。根据句意可知，表示“除非你快点”，故选C。 2．—I’m going to the post office. —________you are there, can you get me some stamps? A．When B．While C．Because D．If 【答案】B 【解析】 试题分析：A. As 一边…一边，作为 B. While当…时候 C. Because 因为 D. lf假如；句意：我将要去邮局。你去那里的时候，能不能给我带一些邮票呢？故选B 考点：连词 点评：连词在中考中涉及到的很多，尤其在宾语从句、状语从句、定语从句中连词是必考点。平时学习过程中，掌握连词的意思，及所表示的关系是至关重要的，这种关系的判断可以通过句子意思的理解来选择恰到的连词。 3．-Have you improved your spoken English？ -Not yet．I'll try my best______I am not good at it now． A．so B．although C．but D．until 【答案】B 【解析】 【详解】 句意：——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．考查连词辨析。A. so所以；B. although 虽然；C. but但是；D. until直到。根据语境推测句意是——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．在这里两个句子之间存在一个相反的让步关系，though/although/even though“虽然；尽管”，引导让步状语从句，故选B． 【点睛】 本题主要考查连词的用法，连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词．前后句之间是让步关系． 4．You will fall behind others ______ you work hard.

高中英语状语从句讲解

高中状语从句讲解+练习 状语通常由副词、介词短语、动词不定式、分词和从句等担当。例如： 1. Naturally , our grandparents were pleased to get our phone call . (副词) 2. We worked hard , from sunrise to sunset . (介词状短语) 3. To help my disabled aunt , I spend an hour working in her house every day . (不定式) 4. Seen from a distance , the farmhouse looked deserted . (过去分词) 5. I know how to light a camp fire because I had done it before .（原因状语从句） 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，尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。现分别列举如下: 1．时间状语从句 常用引导词：when, as, while, as soon as, while, before, after, since , till, until 特殊引导词：the minute, the moment, the second, the instant, immediately , directly, every time, the day，no sooner …than, hardly …when, scarcely …when （1）Tell him I need to see him the minute he arrives. 他一到就告诉他我要见他。 （2）The children ran away from the orchard(果园) the moment they saw the guard. The moment he saw me, he ran away. 他一看见我，就跑了。 He said he’d call you the moment he got home. 他说他一到家就给你打电话 （3）The instant I saw him, I knew he was the man from the restaurant. （4）Immediately you begin to speak, he gives you his full attention.你只要一开始说话，他就全神贯注地听。 （5）My sister came directly she got my message. 我妹妹一收到我的信息就来了。 （6）Every time I listen to your advice, I get into trouble. （7）no sooner... than... ，"一...就..." ，引导时间状语从句,主句用过去完成时,"than"后面的从句用一般过去时.(从这里可以知道,no sooner后面是主句;than后面是从句) 例: I had no sooner reached home than it began to rain. 我一到家天就下起雨来 No sooner ...than...常放在句首,表示强调.这时主句要倒装. 例:No sooner had I reached home than it began to rain. （8）He had hardly sat down when the telephone rang.他刚坐下电话就响了。 He had scarcely sat down when there was a knock at the door. 他刚坐下就有人敲门 另外，如果把hardly放于句首，主句要用倒装结构。如： Hardly had I finished eating when he came in. 我刚吃完他就进来了。 2．地点状语从句 常用引导词：where 特殊引导词：wherever, anywhere, everywhere Generally, air will be heavily polluted where there are factories. She was standing exactly where you are standing now那时他就站在你现在站的地方。 Stay where you are.呆在原地别动。 Wherever you go, you should work hard. Sit anywhere you like 随便坐吧 3．原因状语从句

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 ⑴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 telepho ne rang. As he walked along (沿着走) the lake, he sang happily. He had lear ned a little Chin ese 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 everyth ing whe n 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' 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。Until是指直到某一特定事件发生的时候，而讲话的人在自己心里认为，在那个时刻之后，该事情或该状况将中止 (不怎么可能持续)。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 buildi ng uni ess 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 helyou with your English if am free tomorrow. He won ' t be late uni ess 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=iayau 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：

第五讲-高中英语状语从句详解

状语从句 一：状语从句的定义、功能、分类 定义：在复合句中作状语的从句 功能：状语从句在主从复合句中修饰主句中的动词，形容词或副词，或整个主句 分类：按意义可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。位置：从句的位置放在句首，也可放在句末。放在句首时，从句后面常用一个逗号，放在句末时，从句前一般不用逗号。 二：考点与难点 1、各种从属连词的含义及用法比较； 2、no matter wh- 与wh-ever 引导的从句的区别； 3、状语从句的时态问题； 4、状语从句倒装及省略； 5、状语从句与其它从句的区别。三：九种常见状语从句用法 1. 时间状语从句 引导时间状语从句的从属连词 1）.基本类：before、after、when、while、as、since、till、until、once, as soon as, etc. 2）. 名词类 the moment ,the minute, the second, the instant,etc. (一…就…); every time, each time, the last time, the first time, the day, the year, the morning etc. 3）. 副词类：immediately, directly, instantly, etc. (一...就...) 4）.句型类：no sooner…than…, hardly/scarcely…when…, etc. (一…就…) 注意：1. when, as, while When ①when表示时间点时，从句中用短暂性动词；表示时间段时，用持续性动词。Eg:. When they were still talking and laughing, the teacher came in. （when表示段时间） 2). He waved a hello when he saw her.（when表示点时间） ②. 可用作并列连词，其意义为“这时,突然”，相当于and then suddenly。常用于下列句式： be doing / be about to do sth/ be on the point of doing / have/had done + when Eg.1). I was about to go out when the door bell rang. 2). One evening I was having my dinner when an unexpected friend knocked my door. ③. 还可以表示原因,意思是“既然”，相当于since; considering that Eg. 1). It was foolish of you to take a taxi when you could easily walk there in five minutes . 2). How can he get good grades when he won't study? While ①while通常表示一段时间，从句中常用持续性动词作谓语。 Eg: Strike while the iron is hot. 趁热打铁。 ②while有时可以作并列连词，表示对比，可译成“然而……”。 Eg: 1). I am fond of English while he likes maths. ③while有时可引导让步状语从句，意思是“虽然”。 Eg. While they love the children, they are strict with them. As ①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。 eg: She is singing a song as she took a bath. ②as表示随着 eg: As time goes on, it's getting warmer and warmer. 2. till, until和not…until 1）until /till用于肯定句时，表示直到…为止，主句必须为持续性动词。