Unit 5 Revealing nature Using language 过去完成时课件-高二英语外研版（2019）选择性必修第一册

外研选择性Book1Unit5

Revealingnature

Grammar讲解加练习Pastprtfect

TeachingObjectives

Tolearnbasicstructureandfixedsentencepatternofpastperfect.Tomasterhowtousepastperfectcorrectlyinthepassage.TowritesomesentencesbyusingPastperfect.Lookatthesentencesfromthereadingpassageandanswerthequestions.aDarwinsuspectedthatthefincheshadevolved

fromacommonancestor,…bManypeoplerefusedtobelievethatlivingthings,includinghumans,hadevolvedfromlowerformsoflife.1.Insentence(a),whichactionhappenedfirst?“evolvedfromacommonancestor.”2.Insentence(b),whichactionhappenedfirst?“evolvedfromlowerformsoflife.”3.Whatdoesthestructurehaddoneindicate?Theactionhappenedbeforeacertainpastaction.Activity1leadin探究发现1.Itwasayoungmanwhohadleftmedicialschoolwithoutcompletinghisdegree.2.What’smore,hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe“adisgracetoyourselfandallyourfamily”.3.AfterDarwinhasspentsometimeinSouthAmerica,hisroomontheshipwascrowdedwithsmaplesoftheplantsandanimalshehadcoolected.4.Atthattime,pelplebelievdthatallspecieshadappearedonEarthatthesametime,andhadnotnotchangedsince.5.Itseemedtheirbeekshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.6.Overtime,ithadslowlyevolvedintomanynewspecies.

以上各句黑体部分谓语动词使用的时态是过去完成时态。nowpastfuture过去完成时Chartforthedefiniationofthepastperfect过去的过去Igothomenow10:00pm9:00pmMylittlebrotherwenttobedBeforeI__________,

mylittlebrother

__________

tobed.gothomehadgone一、过去完成时态的构成

肯定句：had+过去分词

被动：hadbeendone

否定句：hadn’t+过去分词

被动：hadn’tbeendone

疑问句：had+主语+过去分词

被动：Had+主语+beendone二、基本用法1.表示在过去某一时间或某一动作之前完成的动作或存在的状态，即过去的过去。句中一般有明确的表示“过去的过去”的时间状语或从句。1)Whenwalkingdownthestreet,IcameacrossDavid,whomI______(notsee）foryears.2).Mr.Smithreturnedtohisofficetogethiskeyhe____(leave).3)Hesaidthathe_____(return)mymoney,butIforgot.要义详忻1.hadn’tseen2.hadleft3.hadreturned2.表示从过去某一时间开始，一直延续到过去的另一个时间动作或状态，常见的时间状语：before,bythen,bythattime,bytheendof,bythetime等。1）Bythenedoflastterm,onlyfourbooks______(finish).2.IttookmealongtimebeforeIwasabletofullyappreciatewhatthey_____(do)forme.3)BythenMary_____(prepare)themealforherparents.3.在hope,think,wish,expect,intend,plan,mean,suppose用过去完成时态，表示“原本……但未能……”。1)I_____(intend)tocallonyouyesterday,butIhadanunexpectedvisitor.2.We_____(hope)thatyouwouldcome,butyoudidn’t.1.hadbeenfinished2.haddone3.hadprepared1.hadintended2.hadhoped4.常使用过去完成时态的句型（1）This/It/Thatwasthefirst/...timethatsb.haddone.这是某人第几次做某事。（2）This/It/Thatwasthe+最高级+(...)+that引导定语从句haddone.

这是某人曾做的的最……的事。（3）Itwas/hadbeen+段时间名词+siincesb.haddone

干某时多长时间了/没做某人多长时间了。（4）hardly/scarcely...when.../nosooner...than...表示“一……就……”.

其中主句haddone,从句用一般过去时态。（5）bythetime+从句

（did)...主句用haddone。表示“到……时，已经……”。

1)ItwasthethirdtimethatMr.Write_____(visit)theGreatWall.2)Itwasexactlyfiveyearssinceherfather_____(die).3)Thiswasthehighestbuildingthathe_____(build)allhislife.4)I_____(hardlyget)homewhentherainpoureddown.=I______(nosoonerget)homewhentherainpoureddown.=Hardly_____Igothomewhentherainpoureddown.=AssoonasI_____(get)home,therain_____(pour)down.5)Bythetimemyparentsreturnedhomeformwork,I______(finish)myhomework.

1.hadvisited2.haddied3.hadbuild4.hadhardlygot;hadnosoonergot;had;got;poured5.hadfinished三、过去完成时态和现在完成时态的区别

两种时态都可以表示一个完成的动作，但它们参照的终止时间不同：过去完成时态指到过去某点为止已发生或完成的动作；现在完成时指到现在为止发生或完成的动作。1）He______(learn)advancedmathematicsbyhimslefbeforehewenttouniversity.2)He_____(alreadyknow)theresult,soyouneedn’ttellhimaboutit.3)I______(live)inChinaforfiveyearsbeforeIwenttoAmerica.4)I_____(live)Chinaforfiveyears,andIloveitverymuch.1.hadlearnt2.hasalreadyknown3.hadlived4.havelived(2022年·天津卷)Thechildrenfailedtohidetheirdisappointmentwhentheyfoundouttheschool________theparty.A．cancels B．willcancelC．hascancelled D．hadcancelled(2020年·江苏卷)InsteadofgettingdowntoanewtaskasI_____,heexaminedthepreviousworkagain.A．hadexpected B．haveexpected C．wouldexpect D．expectDA高考真题(2024年·全国Ⅰ卷改编)ThatwaswhenImetGunter.ItoldhimwhereIwasgoing,buthesaidhe____________(nothear)ofthebusstation.(2024年·全国Ⅰ卷改编)Hepickedmeupatthebusstationwherehe_____________(drop)meofffourdaysbefore.(2024年·全国Ⅰ卷改编)Itoldhimthatthankstohisgenerosityandtimelyhelp,everything_____________(go)smoothly.hadn’theardhaddroppedhadgoneCompletetheparagraphswiththeinformationfromthegivensentences.Thesentencesareintheorderinwhichtheyhappened.Theycanhelpyoutodecidetheuseoftenses.1.aNaturaldisastersledtofood

shortagesinthe1960s.bYuanLongpingbegantodoresearchonhybridrice.cYuanLongpingdevelopedabettertypeofrice.YuanLongping1

todoresearchonhybridricebecausenaturaldisasters2

foodshortagesinthe1960s.Intheend,he3_________abettertypeofrice.beganhadledtodeveloped回归课本P70-71Completetheparagraphswiththeinformationfromthegivensentences.Thesentencesareintheorderinwhichtheyhappened.Theycanhelpyoutodecidetheuseoftenses.2.aGregorMendelchosetostudypeaplantsbecausetheircharacteristicswereeasytocontrol.bGregorMendelmadeimportantdiscoveriesaboutgenetics.cGregorMendeldiedin1884.GregorMendel4

studypeaplantsbecausetheircharacteristicswereeasytocontrol.Bythetimeofhisdeathin1884,he5

importantdiscoveriesaboutgenetics.chosetohadmade回归课本P70-71Completetheblankswiththecorrectformofthewordsinthebox.

competedeclineeatliveintroducearriveLonesomeGeorgewasthelastPintaIslandtortoise.Hediedin2012.AfterGeorge'sdeath,thePintaIslandtortoisewasdeclaredextinct.TheextinctionofthePintaIslandtortoiseisblamedonhumans.Beforehumans1

ontheisland,thespecies2_________inisolationand3_______theplantsthatnaturallygrewthere.arrivedhadlivedeatenLonesomeGeorge3Completetheblankswiththecorrectformofthewordsinthebox.Georgewasdiscoveredmanyyearsaftertheirarrival,andbythenhumans4_______________newspeciesthat5

forthefoodthetortoisesate.Aftergoatsinparticularhadbeenbroughttotheisland,thePintaIslandtortoisepopulation6

.Eventually,onlyGeorgeremained.hadintroducedcompeted

declinedLonesomeGeorge

competedeclineeatliveintroducearriveWorkinpairs.Actoutarole-playusingtheinformationinActivity3.OneofyouwillplaythekeeperofLonesomeGeorge,andtheotherwillplaythereporteraskingaboutGeorge.Usethepastperfecttensewhereappropriate.It'syourturntoActoutyourrole-play,usingthepastperfecttensewhereappropriate.4

Practise一、单句语法填空1.Ifoundthelecturehardtofollowbecauseit______(start)whenIarrived.2.Itisthethirdtimethatyou____(be)lateforworkthsweek,isn’tit?3.

MymothercameinafterI_____(hide)mystorybook.4.Bythetimewearrivedattheparty,they_____(eat)allthefood.5.Suedidn’tgotoseethefilmwithuslastweekbecauseshe______(see)itwithhermother.

6.I____(plan)togoonatriptoBeijingbutIcouldn’taffordthetime.7.Wherehaveyoubeen?We______(expect)youtocomebackmuchearlier.8.WhenIenteredtheclassroom,thelecture_____(begin)andtheaudience____(listen)carefullyandwithinterest.9.Ithasbeenthreeyearssincewe____(become)goodfriends,10.Idon’twanttogotothecinema,forI____(see)thefilmalready.11.XiaoWangsaidthatgreatchanges_____(take)placeinthecityinthepastyears.

1.________________（上周日，我本打算出去散步，但是在早上就开始下雨,intend）.SoIwenttothemovieswithmybestfriend.2._______________（当我起床的时候，我的狗已经把桌子上我的早餐都吃了。bythetime）.ThenIwenttoseethefilm,hungry,3.______________________（但是当我到电影院的时候，电影已经放映20分钟了。beon放映）.4._____________________________（这是我第一次和我最好的朋友