Since用法总结及习题.pdf

一Since 作为介词介词，后接某一确定的时间点确定的时间点，主句谓语动词是持续性动词持续性动词，常与现在完现在完成时态、现在完成进行时态或过去完成时态成时态、现在完成进行时态或过去完成时态连用。例如：1、He left the village in 1982 and I havent seen him sincesince then.1982 年他离开这个村子，从那以后我再没见过他。2、Shes been working in a bank since since leaving school.她中学毕业后就一直在一家银行工作。3.He had spoken to her only once sincesince the party.自从那次聚会以来，他只跟她说过一次话。二Since 作为副词副词，表示从过去以来、以后或到现在过去以来、以后或到现在的情形或状态，常与现在完成时现在完成时态连用态连用。例如：1He left home two weeks ago and we havent heard from him since since.他两周前离开了家，到现在我们一直没有他的消息。2He came to Zhenjiang 6 years ago and has lived here(ever)since since.他 6 年前来到镇江，从此便住在这里。三since 引导原因状语从句原因状语从句作为连词，since 可引导原因状语从句，表示因为；既然；鉴于因为；既然；鉴于：例如：1He didnt come since since he was busy.他因为忙，所以没有来。2SinceSince this method doesnt work,lets try anoter.既然这种方法不行，我们就试用另一种吧。四Since 在特殊句型中的应用句型 I：“It is is（hashas been）+时间+since+持续性动词的过去时”，表示“自从以来到现在已有多久。”例如：It hashas been quite some time since I was was last in London.我上次离开伦敦至今颇有一段时间了。句型 II：“It waswas+时间+since+持续性动词的过去完成时”,表示“从到过去某时间点以来”，例如：It waswas three years since wehad beenhad been here.那时我们在这已呆了三年。六巩固练习（一）单项选择1Do you smoke？_ Its two years since I smokedAYes，I doBNo，I dontCNot too muchDOh，but I wish I didnt2Since you are busy,you _ tomorrow.A.dont need comeB.need not comeC.neednt comeD.mustnt come3.-Has he been home?-_,he _home since he graduated.A.No;hasnt beenB.Yes;has beenC.No;isntD.Yes;is4They _friends since they met in Shanghai.A.havent beenB.have beenC.arentD.are5.I_here since he left the door open,but it seems that he wont come back today.A.have been waitingB.will have waitedC.was waitingD.waited6.I _ from him since he has lived here.A.heardB.have heardC.have never heard D.have been hearing7.He came to China _ 1998.A.fromB.sinceC.atD.in8.-Excuse me.Did you notice whether the No.18 bus had gone by?-I dont know_ I began to stand here just now.A.asB.whenC.sinceD.while现在完成进行时和现在完成时练习1.Im sure Andrew will win the first prize in the final.I think so.He _ for itfor months.for months.(2008 江苏)A.is preparingB.was preparingC.had been preparingD.has been preparing2.By the timeBy the time he realizes he _ into a trap,itll be too late for him to do anything about it.(2008 山东)A.walksB.walkedC.has walkedD.had walked3.So far this year So far this year we _ a fall in house prices by between 5 and 10 percent.(2008福建)A.sawB.seeC.had seenD.have seen4.Cathy is takingis taking notes of the grammatical rules in class at Sunshine School,where she _English for a year.(2007湖南)A.studiesB.studiedC.is studyingD.has been studying5.Danny _ hard for long to realize his dream andnownow he is popular.(2007福建)A.worksB.is workingC.has workedD.had workedDCDDC