英语：过去完成时课件

刘君教学重、难点：1.过去完成时的的巩固及运用。2.过去分词的构成。3.与现在完成时和一般过去时的区别过去完成时的结构：过去完成时的用法：过去完成时的否定形式：过去完成时的疑问形式：主语＋hadnot／hadn’t+p.p.+其它.Had+主语＋p.p.+其它?主语＋had+p.p.+其它.强调过去某一个动作发生在另一个动作前常常用过去完成时态。主语+had+动词的过去分词(p.p.)定义：强调过去某一个动作发生在另一个动作前常常用过去完成时态。1.在老师进入教室前,李磊擦了黑板.LiLei______________(clean)theblackboardbeforetheteachercameintotheclassroom.hadcleaned2.当我们到那儿时火车已经离开了。Thetrain__________(leave)whenwearrivedthere.hadleftWeuseittotalkaboutanactionthathappenedbeforeanotheractioninthepast.构成：2.playedpingpong1.didhishomework——————∣—————∣—————→∣——→nowplayedpingponghaddonehishomeworkHehaddonehishomeworkbeforeheplayedpingpong.Afterhehaddonehishomework,heplayedPingpong.1.ateanapple2.slept——————∣—————∣—————→∣——→nowhadeatenanapplesleptShehadeatenanapplebeforesheslept.Aftershehadeatenanapple,sheslept.drankwaterhadrunoutofbreath1.ranoutofbreath2.drankwaterHehadrunoutofbreathbeforehedrankwater.Afterhehadrunoutofbreath,hedrankwater.——————∣—————∣—————→∣——→now1.cleanedtheblackboard2.closedthewindow——————∣—————∣—————→∣——→nowhadcleanedtheblackboardclosedthewindowShehadcleanedtheblackboardbeforesheclosedthewindow.Aftershehadcleanedtheblackboard,sheclosedthewindow.6:007:00现在BythetimeIgotup,mysisterhadalreadywashedalltheclothes.3.他走以后我找到了那封信。Ifoundtheletterafterhehadgoneaway.Wereachedthecinemalate.Thefilmhadalreadybeenonfortenminutes.4.我们到电影院晚了,电影已经开始十分钟了。1.我到家时她已经睡了。BythetimeIgothome,shehadalreadygonetobed.2.到昨天晚上时消息已传遍全球。Byyesterdayeveningthenewshadspreadthroughtheworld.过去分词的构成：1.规则动词的变化：a)一般情况下在动词后面加edwork------workedplay--------playedb)以e结尾的动词直接加duse------usedrefuse------refusedc)以辅音字母加y结尾的动词，把y改i再加edstudy-----studiedcarry-----carriedd)以重读闭音节结尾的，前面有单个元音字母时，双写辅音字母，再加edstop----stoppeddrop-------dropped2.不规则动词的变化见不规则动词表过去完成时的构成：由助动词had+动词的过去分词（V.pp)1.过去完成时词可以表示过去某一时刻之前发生的动作或呈现的状态，这一动作一直持续或将继续下去。Bysixo’clockthey____________(work)foreighthours.WhenIcametoGZ,he_____________(be)thereforalongtime.用法：1.到了六点钟为止，他们已经工作了八小时了。2.我到广州时，他在那里很长时间了。hadworkedhadbeen3.到上个月中旬我们在北京住了有五年时间了。Bythemiddleoflastmonthwe______________(live)inBeijingforfiveyears.hadlived1.到昨晚上，他已写完那封信。Byyesterdayeveninghe___________(write)thatletter.2.他说他以前见过你。Hesaidthathe____________(see)youbefore.3.当我进来时，他已做完了作业。WhenIcameinhe________________(finish)hishomework.2.过去完成时与bythen(截止到那时);by9o’clock(直到九点钟)bytheendof…(在…结束/末之前);bythetime…(在…时之前);uptillthen(直到那时);upuntillastnight(直到昨晚）等连用，表示过去的过去。hadwrittenhadseenhadfinished3.过去完成时和already,just,ever,yet等连用表示过去的过去。用法：例如：1.他告诉我说他们队已经赢了。Hetoldmethathisteam_________already___________(win).hadwon2.她说她仍没去过长城。Shesaidthatshe_______________(notgoto)theGreatWallyet.hadn’tbeento用法：4.过去完成时与when,before,assoonas,till/until等引导时间状语的从句连用，强调动作发生的时间前后。例如：1.她到家之前她的孩子已经睡着了。Whenshegothomeherchildren____________(sleep).hadslept2.在他们到达之前电影已经开始了。Beforetheyarrivedherethefilm_________already___________(start).hadstartedLastnight,assoonasI_______________(finish)myworkIwenttosleep.3.我完成作业了就去睡觉了。hadfinished常用的时间状语等标志词：1、by,before,when,bythetime等构成的短语或引导的从句。Eg.1)Bythetimeshecametothebusstop,thebushadalreadygone.2)Wehadfinishedthetaskbeforelastmidnight3)WhenIarrivedatthepostoffice,IfoundthatIhadlefttheletterathome4)AfterIhadfinishedmyhomework,Iwenttobed.3、从过去开始，一直持续到过去的另一时间的动作、状态。常用since，for.Eg.ShesaidthatshehadlearnedEnglishforyearssincehecametoourschool注意：瞬间动词不能和一段时间状语，及since,for引导的从句和短语连用。2、由said,told,knew,heard,thought等引导的宾语从句中。Eg.Hetoldmethathehadheardofit.Ithoughtmyhomeworkhadbeenfininshed.ButIdidn’t.1.WestartedtolearnEnglish5yearsago.一般过去时表示在过去某时发生的动作或存在的状态。2.WehavelearnedEnglishfor5years.现在完成时表示的动作发生在过去，但侧重对现在产生的结果或造成的影响，与现在有关。其结构为：“助动词have（has）+过去分词”5yearsagonow5yearsagohavelearnednowRevision过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（past-in-the-past）”。过去完成时的概念与结构特点:pastinthepastpastnow过去的过去过去现在nowpast现在完成时过去完成时timetime过去完成时的判断依据:由“过去的过去”来判定。过去完成时表示“过去的过去”，先发生的动作用过去完成时，后发生的动作用一般过去时。WhenIgottothestation,thetrainhadalreadyleft.Afterhehadfinishedhishomework,hewenttobed.firstfirstWEHADLEARNEDENGLISH4YEARSBYLASTYEAR.5yearsagolastyearnowhadlearned按要求改写下列句子．(5’/1)SimonhadfinishedhishomeworkbeforehewatchedTV.否定句：疑问句：肯定回答：否定回答：Simonhadn’tfinishedhishomeworkbeforehewatchedTV.HadSimonfinishedhishomeworkbeforehewatchedTV?Yes,hehad.No,hehadn’t.1.Afterhe______________(finish)hisworkhewentout.hadfinished2.Thechildrenranawayafterthey___________(break)thewindow.hadbroken3.IwenttoTom’shousebuthe__________(go)out.hadgone4.Annietoldmethathisfather____________(go)toParisandhe____________(come)backinafewdays.hadgonewouldcome5.Myfriend__________(buy)thecartwoyearsago.He________________(buy)itfortwoyears.boughthashad：6.We____________(learn)2000Englishwordssincewecametothisschool.Theteachersaidwe_____________(learn)2000Englishwordssincethen.We____________(learn)500wordslastterm.We______________(learn)2000wordsbytheendoflastterm.7..He________________(have)ameetingnextweek.He________________(have)ameetingtwoweeksago.Hetoldmehe_______________(have)ameetingtwoweeksbefore.8..________you________(be)totheGreatWall?Theteacheraskedifyou_________________(be)totheGreatWall?havelearnedhadlearnedlearnedhadlearn