时间状语从句modul

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,*,表示行为发生的时间，一般由副词，介词短语或相当于副词的词组或短语来充当。,For example:,He is leaving for Shanghai,I bought a computer,The school sports meeting will be held,4.I get up,5.He doesnt go to school,tomorrow.,2 days ago.,the day after tomorrow.,at 6 oclock,today.,every day.,时间状语,如果状语不是简单的“单词或短语”，而是句子呢？,称为状语从句,你来看我，我非常高兴。,他敲门的时候，我正在睡觉。,eg:,I feel very happy,eg:,I was sleeping.,状语从句可位于主句之前，也可位于主句之后。,状语从句放在主句之前时，常用逗号分开。,状语从句放在主句之后时，一般不用逗号分开。,when,you come to see me.,When,he knocked at the door,Grammar,Adverbial clause of time,时间状语从句：,引导时间状语从句的从属连词有：,when,while,as,whenever,before,after,since,till,until,as soon as,等引导。,选,when,？还是,as,比较像，选,while,吧！崩溃,ING,！,when,while,和,as,1,When,既可引导一个,持续,动作，也可引导,一个,短暂,动作，可用于主句和从句动作,同时,发生或,从句动作先于主句动作,。当,主,句是,将,来时，,从,句的时态用,现,在时。（,when,在实,际中用得最多）,take a photo,meet,close,open,come,land,take off,see,arrive,put on,turn off,turn on,call,hear,walk,cook,sleep,write,read,do,study,ride,sing,play,eat,drink,look for,listen,短暂性动词,持续性动词,When,the clock struck twelve,all the lights in the streets were still on.,When,he was at college,he studied very hard.,I will see you,when,I come back from America.,He went home,when,he had finished his homework.,短暂,持续,主将从现,从动前主动后,2,w,hile,指“在某一段时间里”，,“在,期间”，引导的动作,必须,是,持续,性,的,;,强调主从句动作,同时,发生,（,可表对比,译为“而，却”,）。,While he was reading,his wife came in.,While we were swimming,someone,stole our clothes.,如果主句的动作在从句,的动作过程中发生，从句,常用进行时,。,Jane was dressed in blue,while,Mary was dressed in red.,One person may like to spend his vacation at the seashore,while,another may prefer the mountains.,3,a,s,强调并行发生，不指先后，,尤指短动作或事件同时发生,;,主从句同时,可翻译为,”,一边,一边,”,”,随着,”,强调两个动作紧接着,发生。,1.The students sang the English song as they went along the road.,2.,He sang as he worked.,3.,As he grew older he became more confident.,when,as,while 总结,1,、,When,可指,时间点,，又可指,时间段,，从句中可用延续性动词，也可用非延续性动词。,2,、,While,总是指一个时间段，从句中必须用,延续性,动词。,3,、,as,多用于平行结构。表示两个动作同时发生：一个主语,同时,进行两个动作：,一种状态随另一种状态的变化而变化。,Fill in the blank with“when,while,as”,1_ you,meet,a word you dont know,consult the dictionary.,2.The students took notes _ they listened.,3._ the wind rose the noise increased.,4.She called _ I was out.,5._you have finished your work,you may have a rest.,when,as,As,while,When,We do not necessarily grow wiser _ we grow older.,_ in Vienna he studied music.,_ two detectives were keeping guard at the door,two others opened the parcel.,He dropped the glass _ he stood up.,_ I came home,my wife was cooking dinner.,as,While,While,as,When,区别,when,从句的谓语动词可以在主句谓语动作,之前,或,同时,发生；,while,和,as,从句的谓语动作必须是和主句谓语动作,同时,发生。,1.,从句动作在主句动作前发生，只用,when,。,When he,had finished,his homework,，,he,took,a short rest,2.Its cold when it snows,.,暗示一种规律性，表示“每当”,3.,固定搭配中：,be doing sth when,正在某事，这时,The children were playing football in the ground when it began to rain.,孩子们,正在,操场上踢球，,这时,开始下雨了。,be about to do sth when,正准备做某事，这时,I was about to tell her the secret when someone patted me on the shoulder.,我,正想,告诉她这个秘密，,这时,有人拍了我的 肩 膀。,从句动作和主句动作,同时发生,，且,从句,动作为延续性动词时,，,when,，,while,，,as,都可使用。（主短从延三者都可，主延从短只能用,when,和,as,）,When,While,As we were dancing,，,a stranger came in,（,dance,为延续性动词）当我们跳舞 时，一位陌生人走了进来。,It was raining,when/as,we,arrived,.,(arrive,为短暂性动作,),当主句、从句,动作同时进行,，从句动作的,时间概念淡化,，而,主要表示主句动作发生的背景或条件时,，,只能用,as,。这时，,as,常表示“随着,”,；“一边,，一边,”,之意,。,As the time went on,，,the weather got worse,（,as,表示“随着,”,之意）,as soon as,的用法,as soon as,连接的时间状语从句中，指,未发生的动作,，规律是：主句一般将来时，从句用一般现在时代替一般将来时（,主将从现,）,I,will tell,him the news as soon as he,comes,back,。,They,will be,crazy as soon as they,hear,the news,指紧接着发生的两个短动作，主从句都用一般过去时,1)He,took,out his English books as soon as he,sat,down,2)We,ate,a lot as soon as we,got,home.,小结：看,as soon as,的时态，要么两边都是过去时，要么就是主将从现,Since,自从,以来,Sb have/has donesince did,自从,就已经做了某事,eg:I,have dreamed,about becoming a doctor since I,was,a child.,It is/has been+,一段时间,since,从句,(did),自从,以来有,It,is,/,has been,3 years since the war broke out.,自从战争爆发已经有,10,年。,Until,直到,We,waited,until,he came back.,我们一直等到他回来。,She,didnt,stop working,until,eleven oclock.,她到,11,点钟才停止工作。,如主句动词是,延续性动作,，常用,肯定式，,表示,“,直到,为止,”,;,如主句动词是,瞬间动词,，常用,否定式,，表示“,直到,才,”,before,It will be+,一段时间,+before,从句,(do/does),要过,才能做,It will be three days before you can open the cover of the jar.,It will,not,be+,一段时间,+before,从句,要不了,就能做,It will not be ten years before we meet again.,It was+,一段时间,+before,从句,(did),做了,过了,It was ten years before we did the experiment.,It was,not,+,一段时间,+before,从句,(did),做了,没过,It was not long before we returned back.,Thankyou,