Unit5RevealingnatureUsinglanguage過去完成時(shí)課件高二英語選擇性

Unit5Pastperfect過去完成時(shí)1.定義2.結(jié)構(gòu)3.時(shí)間狀語4.用法Pastperfect一、定義表示在過去某一時(shí)間或動(dòng)作之前已經(jīng)發(fā)生或完成的動(dòng)作。eg.Thetrainhadstarted

whenIgottothestation.eg.Bytheendoflastweek,shehadlearned10Englishsongs二、結(jié)構(gòu)肯定：否定：被動(dòng)：eg：She

said

she

had

graduated

fromuniversity.

eg.Ididn’tknowthewaytoJohn’shousebecauseIhadn’tbeentherebefore.eg.Theworkhadbeenfinishedbyhim

beforelastFriday.haddonehadnotdone=hadn’tdonehadbeendone三、時(shí)間狀語by+過去的時(shí)間點(diǎn)

到...為止bytheendof+過去的時(shí)間點(diǎn)bythetime+過去的時(shí)間點(diǎn)bythen到那時(shí)before+過去的時(shí)間點(diǎn)

在...之前eg.Ihadfinishedmyhomeworkbeforesupper.eg.Bytheendoflastmonth,wehadfinishedhalfoftheproject.四、用法1.Itwas＋一段時(shí)間＋since從句(從句用過去完成時(shí))自從...以來，已經(jīng)多久了eg.Itwasthreeyearssincehehadjoinedthearmy.四、用法2.Itwasthe+序數(shù)詞+time＋(that)從句

(從句用過去完成時(shí))這是某人第幾次做某事eg.ItwasthefirsttimethatIhadvisitedtheGreatWall.四、用法3.在“________________________________”句型中，主句用___________，從句用______________。譯為“一......就......”eg.

Ihadnosoonerreachedhomethanitbegantorain.

eg.Hehadhardlylefthisofficewhenthetelephonerang.hardly...when/

nosooner...than/

scarcely...when過去完成時(shí)一般過去時(shí)四、用法4.want,hope,mean打算,plan,intend打算,expect希望,suppose以為,think以為

等動(dòng)詞的過去完成時(shí)可以用來表示過去未曾實(shí)現(xiàn)的愿望/打算/計(jì)劃，意為“本想要/計(jì)劃/以為”。eg.Ihadintendedtomeethimattheairport,butIhadanimportantmeetingtoattend.

eg.Ihadhopedtoseeheragain.ExerciseWe____________(paint)thehousebeforewemovedin.Paul_______(go)outwithJaneafterhehad

madeaphonecall.3)Tomsaidhe__________(read)thebooktwice.4)他說自從1989年以來他就在那家工廠工作。Hesaid____________________________since1989.5)我認(rèn)為我一星期前就把信寄出去了。Ithought_____________________aweekbefore昨晚九點(diǎn)之前我已看完這本小說了。

______________________________bynineo'clocklastnight.hadpaintedwenthadreadhehadworkedinthatfactoryIhadsenttheletterIhadfinishedreadingthenovel

practice1.Jane_________(watch)anaturefilmonTVwhensomeoneknockedonthedoor.2.OnourtriptoAfricalastyear,we__________(see)lionssittinginthetallgrasswatchingus.3.Thegirl,when_________(question)whyshe_________(cheat)intheexam,justloweredherheadandkeptsilent.4.Theboy_________(cry)loudlybecausehe_________(lose)hiswayinthejungleandthoughthecouldn’tgobackhome.5.Theyoungmansaidhe_________(do)nothingwrong．6.Bytheendoflastyear,anothernewhospital_________(build)inourcity.waswatchingsawquestionedhadcheatedcriedhadlosthaddonehadbeenbuiltThetrain____________whenIgottothestation.(start)I____________thestationbeforesixo'clock.(reach)Bythetimewearrived,everyone____________medicalcare.(receive)I_____hardly_____homewhentherainpoureddown.(get)Itwasthethirdtimethathe____________thesamemistake.(make)They___________tohelpbutcouldnotgetthereintime.(want)Shesaidshe__________youyesterday.(see)Iwishedthathe___________hisinterview.(pass)hadstartedhadreachedhadreceivedhadgothadmadehadwantedhadseenhadpassedPractice1.Byyesterdaythey___________(work)forsixdays.2.Bythemiddleoflastmonthwe________(live)inBeijingforfiveyears.3.WhenIcametoGuangzhou,he________(be)thereforalongtime.4.Beforetheyarrivedherethefilm____already______(start).5.I____________(intend)tomeethimattheairport,butIhadanimportantmeetingtoattend.6.Heenteredtheroom,__________(turn)onthelightandreadaneveningpaper.7.Nosoonerhadhearrivedthanhe_______(go)awayagain.8.Itwasthethirdtimethathe___________(be)outofwork.9.Shereturnedthebookthatshe______________.(borrow)10.IthoughtthatI_________(see)himbefore.

PracticehadworkedhadlivedhadbeenhadstartedhadintendedturnedwenthadbeenhadborrowedhadseenCompletetheparagraphswiththeinformationfromthegivensentences.

a.Naturaldisastersledtofoodshortagesinthe1960s.

b.YuanLongpingbegantodoresearchonhybridrice.

c.YuanLongpingdevelopedabettertypeofrice.YuanLongping_____________todoresearchonhyaridricebecausenaturaldisasters______________foodshortagesinthe1960s.Intheend,he____________abettertypeofrice.beganhadledtodeveloped1Completetheparagraphswiththeinformationfromthegivensentences.GregorMendelchosetostudypea豌豆plantsbecausetheircharacteristics特征/性wereeasytocontrol控制.GregorMendelmadeimportantdiscoveriesaboutgenetics.GregorMendeldiedin1884GregorMendel___________studypeaplantsbecausetheircharacteristicswereeasytocontrol.Bythetimeofhisdeathin1894,he___________________discoveriesaboutgenetics.chosetohadmadeimportant2Completetheonlineencyclopediaentrywiththecorrectformofthewordsinthebox.LonesomeGeorgewasthelastPintaIslandtortoise平塔島象龜.Hediedin2012.AfterGeorge’sdeath死亡,thePintaIslandtortoisewasdeclared宣布

extinct滅絕的.

LonesomeGeorge百科全書條目Completetheonlineencyclopediaentrywiththecorrectformofthewordsinthebox.

compete競爭，爭奪 decline下降，減少 eatlive introduce引進(jìn) arriveTheextinction滅絕ofthePintaIslandtortoiseisblamedon歸咎于humans.Beforehumans__________ontheisland,thespecies___________inisolation獨(dú)立and___________theplantsthatnaturallygrewthere.Georgewasdiscovered發(fā)現(xiàn)manyyearsaftertheirarrival,andbythenhumans______________newspeciesthat_________forthefoodthetortoisesate.Aftergoatsinparticular尤其hadbeenbroughttotheisland,thePintaIslandtortoisepopulation種群____________.Eventually最終,onlyGeorgeremained保留.arrivedhadlivedhadeatenhadintroducedcompeteddeclined1Itwasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.(Para1)2Hehadrecentlyreceivedaletterfromhisfather.(Para1)3AfterDarwinhadspentsometimeinSouthAmerica,hisroomontheshipwascrowdedwithsamplesoftheplantsandanimalshehadcollected.(Para2)4Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametime,andhadnotchangedsince.(Para3)5Itseemedtheirbeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.(Para4)Homework：Findmoresentenceswiththepastperfecttenseinthetext.

1.___________________（上周日，我本打算出去散步，但是在早上就開始下雨,intend）.SoIwenttothemovieswithmybestfriend.2.___________________________________（當(dāng)我起床的時(shí)候，我的狗已經(jīng)把桌子上我的早餐都吃了。bythetime）.ThenIwenttoseethefilm,hungry,3.______________________（但是當(dāng)我到電影院的時(shí)候，電影已經(jīng)放映20分鐘了。beon放映）.4._____________________________（這是我第一次和我最好