时间和原因状语从句课件

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,*,Adverbial Clauses of Time,Unit 4 Grammar(1),Adverbial Clauses of TimeUnit,1,时间状语从句：,引导时间状语从句的连词有：,when,while,as,before,after,till,until,since,as soon as,the moment,immediately,every time,next time,the first time,once 等。,时间状语从句：引导时间状语从句的连词有：,2,when,while,as,表“当,.,时”的异同,：,相同点:,当从句的谓语是延续性动词时，三者常可互换,i.e.,When/While/As,we were still laughing,the teacher came in.,不同点:,1),when,既表“时间段”又表“时间 点”,(=during or at the time that),从句中动词既可是终止性的，也可是持续性的，还可表“正在这时”,i.e.,(1).,When,I,arrived,there,they were watching TV.,(2).,When,I,was,young,I liked singing and dancing.,when,while,as表“当.时”的异同：,3,2)while,只表“时间段”,(=during the time that),从句中动词只限于持续性动词，它有时含对照之意，表“然”而,i.e.,(1),He fell asleep,while,he was studying his grammar book.,3)as,用法与,when,相似，但它侧重动作的同时性，表“一边,.,一边,.,”，还表“随着”,i.e.,(1)They talked,as,they walked.,(2),As,time goes by,we get wiser.,2)while只表“时间段”(=during the,4,1.when-正在的时候，突然,I,was walking,along the street,when,I met him.,One evening,little Hans,was sitting,near the fire,when,he heard a loud knock at the door.,I,was about to fall,asleep,when,my sister came in.,He,had just got,back home,when,the telephone rang.,我正准备告诉他那个秘密，这时有人拍了拍我的肩膀。,I,was about to tell,him the secret,when,someone patted me on the shoulder.,I had,hardly,got home,when,it began to rain.,Hardly,had I got home,when,it began to rain.,1.when-正在的时候，突然I had ha,5,1.He transplanted the little tree to the garden _ it was the best time for it.,A.where B.when C.that D.until,2.-Did Jack come back early last night?,-Yes.It was not yet eight oclock _ he arrived home.,A.before B.when C.that D.until,3.He was about halfway through his meal _ a familiar voice came to his ears.,A.why B.where C.when D.while,1.He transplanted the little,6,1)The cost of living in Glasgow is among the lowest in Britain,_ the quality of life is probably one of the highest.,A.since B.when C.as D.while,2)_ I accept that he is not perfect,I do actually like the person.,A.While B.Since C.Before D.Unless,2.连接词while的用法小结,1)while引导的动作,必须是持续性,的，侧重主句动作和从句动作相对比。如：,Please dont talk so loud while others are working.,2)while作为并列连词，意为“而，却”，表示对比。,3)while可表示尽管，相当于although。,1)The cost of living in Glasg,7,While,I was waiting for Tom,three buses went by.,I do every single bit of housework,while,my husband Bob just does the dishes now and then.,While,modeling business is by no means easy to get into,the good model will always be in demand.,While I was waiting for Tom,t,8,when/while doing:,1)When/While,I was looking,through the paper,I,noticed a few grammatical mistakes,When/While,looking,through the paper,I noticed a few grammatical mistakes.,2)While he,was wandering,through the square,he,caught sight of a snake-charmer,While,wandering,through the square,he caught sight of a snake-charmer,when/while done,When,we were taken,round the city,we,were impressed by the citys new look.,When,taken,round the city,we were impressed by the citys new look.,when/while doing:,9,3.not until-直到才,He didnt get off the bus until it stopped.,Not until the bus stopped did he get off it.,It was not until the bus stopped that he got off it.,直到被送入手术间时，他才明白遵守交通规则的重要性。,He didnt realize the importance of observing the traffic regulations until he was sent into the operating room.,3.not until-直到才,10,1.-Was his father very strict with him when he was at school?,-Yes.He had never praised him _ he became one of the top students in his grade.,A.after B.unless C.until D.when,2.A good storyteller must be able to hold listeners curiosity _ he reaches the end of the story.,A.when B.unless C.after D.until,3.It was not _ she took off her dark glasses _ I realized she was a famous film star.,A.when;that B.until;that,C.until;when D.when;then,1.-Was his father very str,11,小结：,till,until和notuntil：,1.until/till引导时间状语从句用于肯定句时，主句的动词 是延续性动词，表示动作或状态一直持续到until/till所 表示的时间，意为“某动作一直延续到某时间点才停止”。如：,We waited until he came.,2用于否定句时，主句谓语动词是非延续性动词，从句为肯定，意为“某动作直到某时间才开始”。如：,The boy wont go to bed till/until his mum returns.,3till不可以置于句首，而until可以。如：,Until you told me I had no idea of it.,4notuntil句型中的强调和倒装说法：,It was not until you told me that I had any idea of it.,Not until you told me did I have any idea of it.,小结：,12,4.before-在之前,He ran off before I could stop him.,现在就做，免得你忘记了。,Do it now before you forget it.,几个星期过去了我才意识到那幅画丢了。,Several weeks had gone by before I realized the painting was missing.,It was not long before I forgot it all.,五年后我们才会再见面呢。,It will be five years before we meet again.,我们将作进一步的讨论，然后再作出最终的结论。,We will have a further discussion before we draw/make a final conclusion.,4.before-在之前,13,1.He made a mistake,but then he corrected the situation _ it got worse.,A.until B.when C.before D.as,2.Scientists say it may be five or six years _ it is possible to test this medicine on human patients.,A.since B.after C.before D.when,3.-Why didnt you tell him about the meeting?,-He rushed out of the room _ I could say a word.,A.before B.untilC.whenD.after,4.It is almost five years _ we saw each other last time.,A.before B.s