现在完成时与过去完成时_.ppt

基本时态构成 ThePastPerfectTense 过去完成时态 1 现在完成时态表示过去发生的动作对现在造成的影响或结果Ourteacherhasleft WehavestudiedEnglish Ihavealreadyfinishedthehomework Hehashadhislunch Hehasbecomeadoctor have has 过去分词 2 某个动作从过去已经开始 一直持续到现在 还有可能持续到将来 动作的持续性要通过一段时间来表示 一段时间的表达方法有两种 for 一段时间forayearfortwoweeksforthreeyears Since过去的某一时刻 sinceninesincelastweek一般过去时态的时间状语从句sinceyoucamesinceyougothome 注意 for和since所引导的时间状语都表示一段时间 Hehasbeenawaysincelastweek Hehasbeenawayforoneweek 对划线部分提问都用Howlong 现在完成时 助动词have has 过去分词 过去完成时 助动词had 过去分词 构成 我认识他三年了 Ihaveknownhimforthreeyears IhadknownhimwhenIwasastudent 我当学生时 就已经认识他了 hadknown haveknown was 我已经做完作业了 表示在说话时已经做完 Ihavefinishedmyhome work 在六点以前 我就已经完成作业了 Bysixo clock Ihadfinishedmyhomework 表示在过去的某一段时间 sixo clock以前 已经做完作业 与现在无关 他们已经吃过早饭了 在他们到旅馆之前他们已经吃过早饭了 Theyhavealreadyhadbreakfast Theyhadalreadyhadbreakfastbeforetheyarrivedatthehotel 我从未看过如此令人兴奋的比赛 他说他从未看过如此令人兴奋的比赛 Ihaveneverseensuchanexcitingmatchbefore Hesaidthathehadneverseensuchanexcitingmatchbefore 过去完成时与现在完成时二者用法基本相同 但现在完成时以现在时间为基点 过去完成时则以过去的时间为基点 与现在无关 即过去的过去 过去完成时常用于宾语从句中 Summary 结构 助动词had p p 过去分词 用法 表示过去某一时间和动作之前已经发生或完成了的动作或一直持续的动作 过去的过去 Bytheendoflastterm wehadlearned600Englishwords Hesaidhehadfinishedhishomework Thefilmhadalreadybegunwhenwegottothecinema IhadstudiedEnglishbeforeIcamehere WhenIcametoGZ hehadbeenthereforalongtime 过去完成时态的标志 和by 过去时间点连用 如 bythetime bythen bylastyear bytheendoflastyear month byfiveo clockyesterdayevening Bytheendoflastterm they learn 10Englishwords 2 和before 过去时间点连用 We arrive thestationbeforeteno clock hadarrived 3 常用于宾语从句中 Shesaidthatshe write threee mails hadwritten 4 和when before after assoonas until till等引导的状语从句连用或用于从句中 Theairplane already leave whenIgottotheairport 5 根据上下文判断 IwenttoLiHong shouse buthe go out hadleft hadgone Lastnight assoonasI finish mywork Iwenttosleep hadfinished Fillineachblankwiththeproperverbform Hesaidthathe write thatletter Beforehearrived thetrain leave Bythen they work foreighthours Whenshegottothecinema thefilm already be onfor15minutes Marytoldmeshe meet mymotherbefore Bysixo clockyesterdayevening I finish myhomework IwenttoLiHong shouse buthe go out We arrive atthestationbeforetwoo clock hadwritten hadleft hadworked hadbeen hadmet hadfinished hadgone hadarrived 1 Afterhe finish hiswork hewentout finished 2 Annietoldmethathisfather go toParisandhe come backinafewdays hadgone wouldcome 3 Myfriend buy thecartwoyearsago He have itfortwoyears bought hashad Fillineachblankwiththeproperverbform 4 Beforetheyarrivedhere thefilm already start had started Fillineachblankwiththeproperverbform A you finish yourhomework B Yes Ihave A Whathadyoudonebeforeyoufinishedyourhomework B I watch TV A What you do now B I write alettertomyfriendTom A youoften write tohim B Yes Andheoften write tome I get aletterfromhimyesterday SoI answer hisletternow A When you post it B I post itassoonasI finish writing Havefinished hadwatched aredoing amwriting Dowrite writes willpost got amanswering willpost finish 1 过去完成时态的肯定式 否定式 疑问式和简短回答 Ihadhadmybreakfastbeforesixo clockthismorning Ihadn thadmyhomeworkbeforesixo clockthismorning Hadyouhadyourbreakfastbeforesixo clockthis Yes Ihad No Ihadn t Shehadleftwhengotthere Shehadn tleftwhenIgotthere Hadsheleftwhenyou