现在完成时与一般过去时的区别PPT课件

.,1,现在完成进行时的主要用法,.,2,一.表示从过去某一时刻开始并一直延续到现在的动作或事情,但动作或事情现在已经结束。,eg：1.Someonehasjustturnedoffthelight.,有人刚把灯关了。,2.Ihavealreadyfinishedmyhomework.,我已经完成了家作。,二.表示从过去某一时刻开始并一直延续到现在的动作或事情,但动作或事情可能仍在继续。,.,3,eg：1.IwanttoseehowmuchtheplacechangedsinceIsawitlast.,我想看看从上次见到那地方以来它发生了多大变化。,2.IhavelearntEnglishformorethantenyears.,我已经学了10多年的英语。,三.表示人曾有过或到目前为止从未有过的经历.,eg：1.HaveyoueverbeentotheSummarPalace?,你曾去过颐和园吗?,2.Ihaveneverhadacar.,我从未有过汽车。,.,4,四.现在完成时还常与句型Thisisthefirsttime，Itsthefirsttime连用。,eg：1.Thisisthefirsttimehehasdrivenacar.,这是他第一次开车。,五.现在完成时和最高级连用表示到现在为止是最的。,Whataboringfilm！,ItsthemostboringfilmIveeverseen.,现在完成时除了上述主要用法之外，还有一些其它用法，在此不一一讲解，请学生自已学习、掌握。,一部多么令人厌烦的电影啊！,这是我看过的最令人厌烦的电影。,.,5,现在完成时与一般过去时的区别,.,6,一.现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身，而是强调事情与现在保持的某种密切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只表示发生在过去的动作和事情与现在没有关系。,.,7,eg：1.HehasboughtanEnglish-Chinesedictionary.他已经买了一本英汉字典。,eg：2.HeboughtanEnglish-Chinesedictionary.他曾买过一本英汉字典。,第一句用现在完成时时态，意为：“HeboughtanEnglish-Chinesedictionary.Andhestillhasit”“过去他买了一本英汉字典，现在他还有这本字典”。,第二句用过去时只叙述过去他买过一本英汉字典这一事实，至于现在他是否有这本字典并未强调说明。,.,8,二当有一个表示过去某一特定时间的状语时，不用现在完成时，而用一般过去时:,eg：1.Isawthefilmontelevisionyesterday.,但since(自以来)+某一过去时间或叙述过去事情的从句总是与现在完成时连用。,eg：1.Theyhaveknowneachothersince1950.,2.Sincehewasachild,hehaslivedinEngland.,.,9,三常与一般过去时连用的典型的表示过去时间的状语,yesterday(昨天),theotherday(前两天),justnow(刚才)，时间+ago,last+时间;etc;,eg:1.Theplanetookofftenminutesago,飞机十分钟前起飞了。,eg:2.Wefinishedourtasklastweek.,我们上周完成了我们的任务。,.,10,四常与现在完成时连用的表示到现在为止这段时间的词短语或从句:,sofar(到现在为止)，upto(till,until)now直到现在，lately（最近）yet,since+过去时间或叙述过去事情的从句。,eg：1.Theweatherhasbeenhotsofarthissummer,到目前为止，今夏天气一直很热。,2.Ihaventseenheryet.,我还未见到过她。,.,11,五可与现在完成时连用，也可与一般过去时连用的时间状语：,for+时间，this+时间,表示不确定时间：ever,never,before,just,recently,already,.,12,eg:1.IhavelearntEnglishforthreeyears.,我学英语（到现在）三年了（仍在学）。,2.IlearntEnglishforthreeyears.,我学了三年英语（现在不学了）。,3.Ihavewrittentwolettersthismorning,今天上午我写了两封信，(说话时仍是上午)。,4.Iwrotetwolettersthismorning.,今天上午我写了两封信，（下午或晚上说的）。,注：表示不确定时间的状语，在句中无其它特定的过去时间状语时，或无表示过去动作的从句时常与现在完成时连用。,eg:1.Ihavenotwrittentomyparentsrecently.,我最近一直未给父母写信。,2.Ihavemethimmanytimesbefore.,我以前见过他多次。,.,13,表示一个持续了一段时间，刚刚结束或仍在继续进行的动作。与现在完成时有所有同的是现在完成进行时强调动作本身或动作的持续性、持久性。,eg：1.Wevebeenlookingforyoueverywhere.wherehaveyoubeen?,我们一直在到处找你，你上哪儿去了？,2.Whathaveyoubeendoing?,你一直在做什么？,3.Ivebeenwritingalaboratoryreport.我一直在写实验报告。,.,14,PARTB:EXERCISES,.,15,一.Findthechoice:1.WhenIwasatschool,I_tothelibraryeveryday.A.goB.wasgoingC.havegoneD.went2.Thenewbooks_yet.A.haventarrivedB.hastarrivedC.didntarriveD.dontarrive3._youever_toshanghai.A.HaventarrivedB.HasntarrivedC.DidntarrivedD.Havebeen,.,16,4.He_hislunch.A.hadB.havehadC.hashadD.ate5.Foryears,doctors_millionsofpatientsliveswiththehelpofmicroscopes.A.savedB.havesavedC.hassavedD.weresaving,.,17,6.IwassohappytoseeJohnagainlastSunday,We_eachotherformorethantwoyears.A.haventseenB.hadntseenC.didntseeD.hasntseen7.We_threelessonsthismonth.A.havelearnedB.learnedC.haslearnedD.werehaving,.,18,8.I_toParisseveraltimes.A.wentB.havegoneC.havebeenD.wasgoing9.Alice_inchinafortenyears.A.haslivedB.havelivedC.livedD.haslive,.,19,10.Myuncle_inthiscitysince1980.A.livesB.havelivedC.haslivedD.lived11.BynowoldWang_inthatfactoryfortwentyyears.A.haveworkedB.workedC.worksD.hasworked,.,20,12.Christianity(基督教)hasbecomeaworldwidereligion(宗教)sinceit_almosttwoyearsago.A.beginB.beginsC.beganD.hasbegin13.Shakespeare_manyplayssuchasHamlet,andRomeoAndJuliet.A.writesB.havewrittenC.wroteD.haswritten,.,21,14.Whenwelivedinphoenixwe_atArizonaStateuniversity.A.studiedB.havestudiedC.studyD.werestudying15.IwrotetomyparentsthreemonthagobutI_tomyparentslately.A.haventwrittenB.dontwriteC.didntwriteD.willnotwrite,.,22,16.LiMing_toShanghai.Hewillbebacknextmonth.A.wentB.havegoneC.hasgoneD.willgo17.She_anactressforsometime.A.wasB.beingC.isD.hasbeen,.,23,18.ProfessorChen_ourexamsyet.A.didntmarkB.hasntmarkedC.willnotmarkD.haventmarked19.Heleftlastyearand_awayeversince.A.isB.havebeenC.wasD.hasbeen20.I_mytasktheotherday.A.finishedB.havefinishedC.finishD.willfinish,.,24,二.choosetheonethatiswrong:1.IlivedinthiscitysinceIwasachild.2.Ilostmypen,Ihavetowritewithapencil.3.HangzhouisthemostbeautifulcityIsaw.4.Shehasreadthebooklastweek.,C,.,25,5.MyclassmatesandIhavevisitedthememorialhallofchairmanMaoyesterday.6.Mygrandmotherhaslivedwithussincemygrandfatherhasdiedsixyearsago.,.,26,7.Afterbreakfastshetakesawalktobuythemorningpapershedoesthiseverymorningfortenyears.8.Itwasveryhotlately,butitsbeginningtogetabitcooler.9.Haveyougonetothegreatwall?Yes,Ihave,IwenttherelastSunday.,.,27,三.FillintheblanksForthelastthreedaysI1_(work)hard.Whenwemovedinthreedaysago,everythingwasinamess,butnowI2almost(finish)thejob.TodayI3(work)sincebreakfastand4(nothave)anythingtoeat.Anne5(bring)measandwichanhouragobutI6(tell)hernottocomeintothekitchen.,.,28,I7(never,forget)what8(happen)severalyearsagowhenshetriedtohelpme,I9(hothave)manyaccidentssincethenbutAnne10(often,warn)metobecareful.she11(warn)meagainthismorningatbreakfasttime,.,29,butI12(work)forfourhoursandnothing13(go)wrong.NowI14(drop)thetinofpaint.Hasanythinglikethateverhappenedtoyou？,.,30,练习参考答案一.1.D2.A3.D4.C5.B6.A7.A8.C9.D10.C11.D12.C13.C14.A15.A16.C17.D18.B19.D20.A二.1.A2.A3.D4.A5.B6.C7.C8.A9.B10.B1.lived-havelived2.lost-havelost3.saw-haveseen4.hasr