Unit5RevealingnatureUsinglanguage课件高中英语选择性

四川省宜宾市第六中学校胡孝刚Period3:GrammarthePastPerfectTenseBook4Unit5Revealingnature学习目标任务学习理解过去完成时态的概念和基本用法；现在完成时态和过去完成时态的区别；顺利完成与过去完成时态的练习题Lookatthesentencesfromthereadingpassageandanswerthequestions.Darwinsuspectedthatthefincheshadevolvedfromacommonancestor,...Manypeoplerefusedtobelievethatlivingthings,includinghumans,hadevolvedfromlowerformsoflife.Insentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?2.Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?3.Whatdoesthestructurehaddoneindicate?Task1:

Learn&learnInsentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?

Insentence(a),“evolvedformacommonancestor”happenedfirst.2.Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?

Insentence(b),“evolvedfromlowerformsoflife”happenedfirst.3.Whatdoesthestructurehaddoneindicate?Itindicatestheactionhappenedbeforeacertainpastaction.Darwinsuspectedthatthefincheshadevolvedfromacommonancestor,...Manypeoplerefusedtobelievethatlivingthings,includinghumans,hadevolvedfromlowerformsoflife.Task1:

Learn&learnNowlookformoresentenceswiththepastperfecttenseinthereadingpassage,andsummariseitsuseinyourownwords.1.Itwasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.2.What’smore,hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe“adisgracetoyourselfandallyourfamily”.3.AfterDarwinhadspentsometimeinSouthAmerican,hisroomontheshipwascrowdedwithsamplesoftheplantsandanimalshehadcollected.Task1:

Learn&learnNowlookformoresentenceswiththepastperfecttenseinthereadingpassage,andsummariseitsuseinyourownwords.4.Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametime,andhadnotchangedsince.5.Itseemstheirbeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.6.Overtime,ithadslowlyevolvedintomanynewspecies.Task1:

Learn&learnpresentpast

pastperfecttheactionwhichoccurspreviouslyintimeisexpressedinthepastperfecttensetheactionwhichoccurslaterisexpressedinthepasttenseWeusethePastPerfectTensetosaythatsomethinghadalreadyhappenedbeforeanotherpastactionorspecifictimeinthepast.had(not)done过去已经做Task2:

Learn&develop1.表示在过去的某一时间或某一动作之前完成的动作或存在的状态：过去的过去。

egBeforewegottothetrainstation,thetrainhadalreadyleft.(我们到达火车站之前，火车就已经离开了。)2.表示从过去某一时间开始，一直延续到过去的另一个时间的动作。常用时间状语：bythen,bytheendof,bythetime.egBytheendoflastterm,wehadlearnt2,000Englishwords.(到上学期期末为止，我们已经学习了2,000个英语单词了。)Theyhadlivedtherefortenyearsbythen.(到那时为止，他们已经在那里住了10年了。)Task3:

Learn&use3.表示愿望、打算等的动词，如hope，want，expect，think，mean，suppose，intend，plan等后接从句时，一般用过去完成时表示本打算实现而未实现的愿望和计划。Ihadintendedtomeethimattheairport,butIhadanimportantmeetingtoattend.(我本打算去机场接他，但是我有个重要的会议要参加。)IhadhopedtotakeaholidaythisyearbutIwasnotabletogetaway.(我原打算今年去度假，可是我离不开。)Task3:

Learn&use4.在句型hardly…when和nosooner…than中，主句用过去完成时，从句用一般过去时：一……就……。HardlyhadIleftwhenitbegantorain.(我刚离开就开始下雨了。)Nosoonerhadhesatdownthanthetelephonerang.

(他刚坐下，电话铃就响了。)Task3:

Learn&use5.过去完成时还可用于一些固定句型：◆It/This/Thatwas+thefirst/second...+time+that从句，从句谓语常用过去完成时。

egItwasthefirsttimethatwehadbeentoChicago.◆Itwas+一段时间+since从句，从句谓语用过去完成时。

egItwastwoyearssincehehadjoinedthearmy.Task3:

Learn&usepresentpast

pastperfect“过去”的角度回顾一个更远的过去，强调“过去的过去”。从过去持续到现在的动作或事件，对现在仍有影响。Task4:

Learn&understandhave/has(not)done现在已经做thisweek,thisyear,recentlyhad(not)done过去已经做by,bytheendof,bythetime,before,when理解下列时态，现在完成时态&过去完成时态1.Wehavelivedherefortenyears.Wehadlivedherefortenyearswhenwehadtomovelastyear.2.Ihavelearnt2,000Englishwordssofar.Ihadlearnt2,000Englishwordstillthen.3.Haveyoureadthenewspapertoday?BytheendofAugust,theyhadtreatedover5,000patients.Task4:

Learn&understandJane_________________(watch)anaturefilmonTVwhensomeoneknockedonthedoor.OnourtriptoAfricalastyear,we__________(see)lionssittinginthetallgrasswatchingus.Thegirl,when_______________(question)whyshe________________(cheat)intheexam,justloweredherheadandkeptsilent.Theboy_________(cry)loudlybecausehe_________(lose)hiswayinthejungleandthoughthecouldn’tgobackhome.Theyoungmaninsistedhe_________(do)nothingwrongandthatthepolice_________(release)him．Bytheendoflastyear,anothernewhospital_________(complete)inourcity.Igotane­mailfrommyoldfriendlastSunday.Untilthen，we_________(keep)intouchfornearly3years.Task5:

Drill&learnwaswatchingsawquestionedhadcheatedcriedhadlosthaddonereleasehadcompletedhadkeptCompletetheparagraphswiththeinformationfromthegivensentences.1.began2.hadledto3.developed4.choseto5.had