高中英语 unit 3《amazing people-grammar and usage》教案5 牛津译林版必修2

《高中英语 unit 3《amazing people-grammar and usage》教案5 牛津译林版必修2》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、●GrammarandUsageHerewewilllearntorecognizesituationswherethepastperfecttenseisusedandthetimeexpressionsusedtogetherwiththetense.Wewillalsoseehowthetenseisformed.Youwillreadtwostoriesandcompletethemusingthecorrectverbforms.Payattentiontothedifferencesbetweenthepastperf

2、ecttenseandthesimplepasttense.Step1:PastperfecttensePastperfecttenseisusedtoindicatethatoneactionoccurredbeforeanotheractioninthepast.Inotherwords,pastperfecttenseindicatesthefirstofthetwoactions.FormofPastPerfect[had]+[pastparticiple]Examples:IhadstudiedalittleEnglis

3、hwhenIcametotheU.S.TheyhadnevermetanAmericanuntiltheymetJohn.Note:WhenyouareusingaverbtensewithmorethanonepartsuchasPastPerfect(hadmet),adverbsoftencomebetweenthefirstpartandthesecondpart(hadnevermet).USE1CompletedActionBeforeSomethinginPastThePastPerfectexpressesthei

4、deathatsomethingoccurredbeforeanotheractioninthepast.Itcanalsoshowthatsomethinghappenedbeforeaspecifictimeinthepast.Examples:IhadneverseensuchabeautifulbeachbeforeIwenttoKauai.HadyouevervisitedtheU.S.beforeyourtripin1992?Yes,IhadbeentotheU.S.oncebeforein1988.USE2Durat

5、ionBeforeSomethinginthePast(Non-continuousVerbs)WithNon-progressiveVerbsandsomenon-progressiveusesofMixedVerbs,weusethePastPerfecttoshowthatsomethingstartedinthepastandcontinuedupuntilanotheractioninthepast.Examples:Wehadhadthatcarfortenyearsbeforeitbrokedown.Bythetim

6、eAlexfinishedhisstudies,hehadbeeninLondonforovereightyears.IMPORTANTSpecificTimeswiththePastPerfectUnlikethePresentPerfect,itispossibletousespecifictimewordsorphraseswiththePastPerfect.Althoughthisispossible,itisusuallynotnecessary.EXAMPLE:ShehadvisitedherJapaneserela

7、tivesoncein1993beforeshemovedinwiththemin1996.IfthePastPerfectactiondidoccurataspecifictime,theSimplePastcanbeusedinsteadofthePastPerfectwhenbeforeorafterisusedinthesentence.ThewordsbeforeandafteractuallytellyouwhathappensfirstsothePastPerfectisoptional.Bothsentencesb

8、elowarecorrect.EXAMPLE:ShehadvisitedherJapaneserelativesoncein1993beforeshemovedinwiththemin1996.ShevisitedherJapaneserelati