现在完成时与过去完成时_ppt.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。,Bysixoclock,Ihadfinishedmyhomework.,表示在过去的某一段时间（sixoclock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,byfiveoclockyesterdayevening,Bytheendoflastterm,they_(learn)10Englishwords.,2.和before+过去时间点连用,We_(arrive)thestationbeforetenoclock.,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,IwenttoLiHongshouse,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.Bysixoclockyesterdayevening,I_(finish)myhomework.IwenttoLiHongshouse,buthe_(go)out.We_(arrive)atthestationbeforetwooclock.,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：,Ihadhadmybreakfastbeforesixoclockthismorning.,Ihadnthadmyhomeworkbeforesixoclockthismorning,Hadyouhadyourbreakfastbeforesixoclockthis?,Yes,Ihad.No,Ihadnt.,Shehadleftwhengotthere.ShehadntleftwhenIgotthere.Hadsheleftwhenyougotthere?Yes,shehad.No,shehadnt.,学习过去