过去完成时课件

ThePresentPerfectTense现在完成时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.(1)recently,inrecentyears(2)For/in/during/overthelast/past30years,greatchangeshavetakenplaceinmyhometown.(3)Since+过去的某一时刻,sincenineyesterdaysincelastweeksinceyoucamesinceyougothome.Wehaven’tseeneachothersincelastyear.Wehaven’tseeneachothersincewegraduatedfromouruniversity.ThePastPerfectTensesNew过去完成时现在完成时：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。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用于由by,before等构成的短语引导的从句或者通过上下文表示。具体用法如下：BeforeImether,Ihadheardalotabouther.Before/When/Bythetime/ByBytheendof+过去时态+从句过去完成时态主句٫（2）bythetime（=when）我们赶到学校时，已经上课了。到……时____________wegottoschool,theclass____already________Bythetimehadbegun.当我到达火车站时，火车已经开走了。BythetimeI___tothestation,thetrain____already_____.gothadleft到上学期末，我们共学1500个单词。Bythe___of___termwe_________1,500wordsendlasthadlearnt当他到学校时，他意识到他把作业忘在家里了。Whenhe___toschool,he_______thathe_________hishomeworkathome.hadleftgotrealizedShesaidthey________allthepreparation_____Icame.hadmadebefore她说在我来之前她们已经做好了一切准备。当我到达学校时，学生们都已经放学了。School_______overbythetimeI____there.hadbeengot当我迟到20分钟到机场时，他已经乘出租车去宾馆了。He_________ataxitothehotelwhenI______theairport20minuteslater.hadtakengotto当我昨天到达电影院时，电影已经开始了。WhenIgottothecinemayesterday,thefilmhadalreadybegun.他说他从来没读过如此有趣的故事。Hesaidthathehadneverreadsuchaninterestingstory1.（2011·天津卷）Inthelastfewyearsthousandsoffilmsallovertheword．A．haveproducedB．havebeenproducedC．areproducingD．arebeingproduced2.（2011·北京卷）ExperimentsofthiskindinboththeU．S．andEuropewellbeforetheSecondWorldWar．A．haveconductedB．havebeenconductedC．hadconductedD．hadbeenconductedBD3．（2011·四川卷）19．—Whatamistake!—Yes．Ihisdoingitanotherway,butwithoutsuccess．A．wassuggestingB．willsuggestC．wouldsuggestD．hadsuggested4.（2011·辽宁卷）BythetimeJackreturnedhomefromEngland,hisson______fromcollege．A．graduatedB．hasgraduatedC．hadbeenD．hadgraduated5.（2011·湖南卷）ItisthemostinspiringlecturethatI________sinceIcametothisschool．A．attendedB．hadattendedC．amattendingD．haveattendedDDD6.（2011·山东卷）Shewassurprisedtofindthefridgeempty;thechild_____everything!A．hadbeeneatingB．hadeatenC．haveeatenD．havebeeneating7.（2011·福建卷）Lastmonth,theJapanesegovernmentexpressedtheirthanksfortheaidthey_____fromChina．A．receiveB．arereceivingC．havereceivedD．hadreceived8.She_____herkeysintheofficesoshehadtowaituntilherhusband____home.A.hasleft;comesB.hadleft;wouldcomeC.hadleft;cameD.left;hadcomeBDC