单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,状语从句讲解,在复合句中由,从句表示的状语,称作状语从句，它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。,准确掌握每一个,连词,的含义是掌握状语从句的关键。,同时要注意主从句的,时态呼应,。,考核要求,定义,类型,时间,状语从句,地点,状语从句,原因,状语从句,目的,状语从句,结果,状语从句,条件,状语从句,方式,状语从句,比较,状语从句,让步,状语从句,连词,状语从句类型,从属连词,时间状语从句,when,，,whenever,，,while,，,as,，,before,，,after,，,since,，,now that,，,until,，,once,，,the moment,，,immediately,，,no soonerthan,，,the second,，,instantly,，,hardly,地点状语从句,Where,wherever,everywhere,anywhere,原因状语从句,because,as,since,seeing(that),now(that),结果状语从句,so that,sothat,suchthat,条件状语从句,if,，,unless,，,as long as,suppose,，,supposing,，,in case,，,so far as,，,provided,目的状语从句,so,，,so that,，,in order that,，,for fear that,，,lest,让步状语从句,although,though,however(=no matter how),even if,whetheror,方式状语从句,as,，,as if,，,as though,比较状语从句,asas,，,not as as,，,than,时间状语从句,掌握：,1.when/while/as,2.before/after,3.till/until,4.since,5.as soon as,immediately,directly,instantly,the moment,the instant,the minute,时间状语从句-when/while/as,三者可表示“,当,时候,”，区别如下：,(1),若,主句,表示的是一个,短暂性动作,，,从句,表示的是一个,持续性动作,，三者都可用：,He fell asleep,when,while,as,he was reading.,(2),若,主、从句,表示,两个同时进行的持续性动作,，且强调主句表示的动作延续到从句所指的整个时间，通常要用,while,：,Dont talk,while,youre eating.,I kept silent,while,he was writing.,时间状语从句-when/while/as,(3),若主从句表示的两个同时进行的动作含有“,一边,一边,”之意思，通常用,as,：,She sang,as,she went along.,(4),若,从句,是一个,短暂,性动作，,主句,是一个,持续性,动作，可用,as/when,但不用,while,：,It,was raining,hard,when,as,we,arrived,.,(5),若主从句表示的是,两个同时,(,或几乎同时,),发生的短暂性,动作，用,as/when,：,I thought of it just,when,as,you opened your mouth.,就在你要说的时候，我也想到了。,时间状语从句-when/while/as,(6),若要表示两个正在,发展变化,的情况，“,随着,”，用,as,：,Things are getting better and better,as,time goes on.,As,it grew darker,it became colder.,(7),when,可用作,并列连词,，表示“,这时,(,突然,)”,；,while,也可以用作,并列连词,，表示,“而”,、,“却”,(,表示对比,),；但,as,则没有类似用法：,We were about to start,when,it began to rain.,He likes coffee,while,she likes tea.,时间状语从句-when/while/as,注意：,当使用连接词,when,表示“,时候,”时，它所引导的,从句,中,谓语,动词用,一般现在时或者一般过去时,，不能用完成时态；,when,，,while,和,as,都引导表示时间的状语从句，它们的区别在于,动作发生的时间顺序,。用,when,时，从句的动作可以与主句的,同时发生或先于主句动作发生,；用,as,时从句和主句动作,同时发生,；用,while,时从句和主句动作,同时发生,，也可表示,持续一段时间,。,_ we were talking,Mr.Smiths came in.,_ they came home,I was cooking dinner.,I was about to go to bed _ I heard someone knock at the door.,4._ we were watching TV,he was studying.,5.He is fat _ his brother is thin.,6._ she sang,tears ran down her face.,用,when,while,或,as,填空,:,While/As/When,When,when,While,while,As,时间状语从句-before/after,Before,在,之前；,After,在,之后,表示主从句的动作先后发生,1.,当,主句,用,将来时,，,从句,总是用,现在时,；,2.,如果,before,引导的,从句,谓语用的是,过去时,，则,主句,动词多用,过去完成,时；,3.After,表示主句动作发生在从句动作之后。主句和从句的动作的时间关系正好与,before,引导的从句相反。,时间状语从句-before/after,1.It,will,be four days,before,they,come,back.,2.My father,had left,for Canada just,before,the letter,arrived,.,3.,After,you,think,it over,please,let,me know what you decide.,4.,After,we,had,finished the work,we,went,home,Before,与,after,Finish your homework _ you go out to play.,He had walked three days _ he found water.,It was not long _ he left his hometown.,Before,与,after,4.I played football _ I(had)finished my homework,5.Please tell her Ill come _ I do some shopping.,6.It will not be long _ we meat each other again.,时间状语从句-till/until,till,和,until,一般情况下两者可以互换，但是在,强调句型,中多用,until,。,注意：如果,主句,中的谓语动词是,瞬时动词,时，必须用,否定形式,；如果,主句,中的谓语动词是,延续性动词,时，用肯定或否定形式都可以，但表达的意思不同。,I did,nt,go to bed,until,（,till,）,my father came back.,It,was,not until,the meeting was over,that,he began to teach me English.,I,worked,until,he came back.,我工作到他回来为止。,I did,nt,work,until,he came back.,他回来我这才开始工作。,till,与,until,1.He lived with his parents _ he graduated from college.,2.The children,wont come,home _ its dark.,3._ you told me I had no idea of it.,4.Not _ he told me,did I know,the truth.,5.It was _ the war was over that he returned to his land.,时间状语从句-since,since,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。一般情况下，,从句,谓语动词用,一般过去时,，而,主句,的谓语动词用,现在完成时,。,I have been in Beijing,since,you left.,区别：,1.It is since,从,以来多长时间了,It is five years,since,we met last time.,2.It is before(,才,),It was a long time,before,I went to sleep again.,时间状语从句-“一.就.”,as soon as,immediately,directly,instantly,the moment,the instant,the minute,I will go there,directly,I have finished my breakfast.,吃完早饭，我立即到那里去。,The moment,I heard the news,I hastened to the spot.,我一听到消息，马上赶到了出事地点。,As soon as,I reach Canada,I will ring you up.,我一到加拿大，就给你来电话。,时间状语从句-“一.就.”,hardly(scarcely,rarely)when,no soonerthan,主句,用,过去完成时,，,从句,用,一般过去时,。当,hardly,scarcely,rarely,和,no sooner,位于,句首,时，,主句应用倒装语序,。,He,had,no sooner,arrived home,than,he,was,asked to start on another journey.,No sooner,had,he,arrived home,than,he,was,asked to start on another journey.,I _(be)at his bedside,since,he _(become)ill.,It _(be)two years,since,we _(be)university students.,_(,一,就,)he saw the monster,he turned pale.,填空,4.The spy had _ returned home,than,he was told to go to another country.,5.We had _ returned home,when,it rained.,6._ had we begun,when,we were told to stop.,填空,(1),当主句为将来时态或具有将来意义时，时间状语从句通常要用,一般现在时表示将来意义,。,Turn off the lights,before,you,leave,.,I will tell him,as soon as,he,a