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1、1 三大从句之一：典型例句突破状语从句 前言：学习状语从句的几个关键点 1）引导状语从句的连词及意思 2）状语从句与主句的时态照应 提高学生掌握：- 3）有关状语从句的重点句型。4）状语从句的省略 一各种状语从句的典型例句 1条件状语从句：引导条件状语从句的词（组）主要有 if, unless, so (as) long as, 注意： 条件从句中的 if 不能用 whether 替换。 提高掌握：on condition that, so (as) far as, if only ( = if )。 1）Lets go out for a walk unless you are too ti
2、red.( ) 即：If you are too tired,well not go out for a walk. 2）You may borrow my book as long as you keep it clean.( ) 提高掌握： 3）I can tell you the truth on condition that you promise to keep a secret.( -) 4）Supposing it rains, shall we continue the sports meeting?( ) 5）You will be successful in the int
3、erview once you have confidence.( ) 2.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 提高学生掌握：(或 the moment ), by the time, every time 等引导。 1）When she came in, I stopped eating. (当-的时候，表示“瞬时动词”) 2）While my wife was reading the newspaper, I was watchi
4、ng TV. (当-的时候， was reading是延续性的动词， was reading和 was watching同时发生 ) 3）I like playing football while you like playing basketball.（然而，表示“对比” ） 4）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） 5）We always sing as we walk.（as 表示“一边一边”） 6）Einstein almost knocked me down before h
5、e saw me.(“在-之前”或“-才” ) 7）After you think it over, please let me know what you decide. （在-之后） 8）I didnt go to bed until（till）my father came back.(“直到-才” ，主句中的 动词为非延续性动词 ) 9）I worked until he came back. (“直到-才” ，主句中的动词为延续性动词 )2 10) Where have you been since I last saw you? (自从-) 11)As soon as I reach
6、 Canada, I will ring you up. (一-就-) 提高学生掌握： 12) Each time he came to Harbin, he would call on me.( “每当-的时候”或“每 次” ，复习 each time, every time 和 whenever) 13) I will go there immediately,I have finished my breakfast. (一-就-，另外有 instantly) 14)The moment I heard the news, I hastened to the spot. (一-就-，另外有
7、 the instant, the minute，ect.) 15) By the time you came back, I had finished this book.(“到-时为止”，从句是 一般过去时，主句是过去完成时。 ) 提高学生掌握： 有关时间状语从句的重点句型 1）It will be four days before they come back. (It will be- before-过很久才 -) 2）It wont be four days before they come back.( It wont be-before-不久就-) 2）It was not un
8、til the meeting was over that he began to teach me English.(“ It was not until-that-” not until 的强调句型 ) 3) It is/has been five months since our boss was in Beijing.我们老板离开北京有五个 月了。(“It is/has been-since” 自从-以来多长时间 ) 4) Hardly had I sat down when he stepped in.我刚坐下，他就进来了。 （“hardly/scarcely-when-”/同“no
9、 sooner -than” 注意时态的应用。） 3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。 1)The sweater shrank because it was washed badly. (强调“直接原因”) 2)Since As weve no money, we cant buy it. （由于） 3) Since you are free today, you had better help
10、 me with my mathematics. （“既然”强调双方共知的原因 , 4）He could not have seen me, for I was not there.( for 引导的原因状语从句 并不说明主句行为发生的直接原因， 只提供一些辅助性的补充说明， for 引导的 原因状语从句只能放于主句之后并且必须用逗号将其与主句隔开。 )4 结果状语从句 由 so that （从句谓语一般没有情态动词） ，so that, such that 等引导 She was ill, so that she didnt attend the meeting.3 He was so ex
11、cited that he could not say a word. She is such a good teacher that everyone admires her.5目的状语从句 引导目的状语从句最常用的词（组）是 so, so that（从句谓语常 有情态动词）= in order that, in case（以防，以免）等。 1）You must speak louder so that /in order that you can be heard by all.( 为了；以便 ) 2.Speak clearly, so that they can understand y
12、ou. 3）Better take more clothes in case (以免)the weather is cold.6让步状语从句 让步状语从句可由 although, though, as, even if (though), 提高掌握：however, whatever, 注意：as 引导的让步状语从句一般是倒装的。 1）Although/Though he was worn out, (still) he kept on working.( 虽然，纵 然,尽管) 2) Well make a trip even if/though the weather is bad. (“即
13、使”) 提高掌握 3)Hard as/ though he works, he makes little progress. ( 虽然，纵然，尽管) 4)Child as/though he was, he knew what was the right thing to do. ( 虽然， 纵然，尽管) 5) No matter who you are, you must keep the law.(=Whoever you are, you must keep the law.（无论谁，复习 no matter +疑问词引导的状语从句。） 6）While I like the colour
14、, I dont like the shape.（尽管） 7方式状语从句 You must do the exercise as I show you. 二状语从句的省略： 状语从句的省略原则主要是：如果从句中的主语和主句中的主语一致，就可以经过一定 的变动把状语从句中的主语和谓语的一部分或全部省略，或从句中是 it is ,可以把 it is 省 略，从而使语言更加简洁、明了。现就把各种状语从句的省略现象列举如下： 1.While(I was) at college, I began to know him, a strange but able student. 2Dont come in
15、 until (you are) asked to. 3Whenever (it is )possible, you should come and help. 4Put in articles wherever(it is) necessary in the following passages. 5. He will come if (he is) asked.4 6. Even if (I am ) invited to, I wont go to such a bad lecture. 7. She has finished the work earlier than (it has
16、been ) expected.状语从句巩固练习题： 一：基础巩固对比练习题 第一组： ( ) 1 The meeting didnt 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. didnt go; after C. went; until D. didnt go; until ( ) 3 I wont believe you_ I have seen it with my own eyes. A. before B. until C. after D. when( ) 4 Tom will call m
