Unit 1 Tales of the unexplained Grammar and usage 课件

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1、Unit1TalesoftheunexplainedGrammarandusage课件PresentPerfectTense现在完成时&PresentPerfectContinuousTense现在完成进行时PartAPresentperfecttenseForm:have/has+donePresentperfecttenseTheboyisveryhappy.Theboy___________(catch)abird.Connectionwiththepast:Theboycaughtabird.Connect

2、ionwiththepresent:Theboyishappy.PresentperfecttenseTheboyisveryhappy.Theboy___________(catch)abird.hascaughtConnectionwiththepast:Theboycaughtabird.Connectionwiththepresent:Theboyishappy.PresentperfecttenseLook,thewindowisopen.Ericopenedthewindowjustnow.Eric__

3、___________________(alreadyopen)thewindow.Connectionwiththepast:Ericopenedthewindow.hasalreadyopenedConnectionwiththepresent:Thewindowisopen.Summary⑴Weusethepresentperfecttensetotalkaboutthingsthathappenedintherecentpast,butareconnectedtothepresent.Presentperf

4、ecttenseDaniel__________(live)inBeijingsincehecametoChina.haslivedConnectionwiththepast:DanielcametoChina.Connectionwiththepresent:DanielislivinginChina.Summary⑵pastnowfuturecamehaslivedWeusethepresentperfecttensetotalkaboutsomethingthatstartedinthepast,andiss

5、tillhappeningnow.组卷网PresentperfecttenseTheboysaretired.They________________(justplay)aballgamehavejustplayedConnectionwiththepresent:Theboysaretired.Connectionwiththepast:Theboysplayedaballgame.Summary⑶Weusethepresentperfecttensetotalkaboutactionsthatwerecompl

6、etedonlyashorttimeago.PresentperfecttenseIwenttoEgyptin1986.I__________(be)toEgypttwice.IwenttoEgyptin2004.havebeenSummary⑷Wecanalsousethepresentperfecttenseforrepeatedactions.Presentperfecttense____itever________(snow)inHongKong?HassnowedNo,it____never_______

7、(snow)there.hassnowedSummary⑸Weusethepresentperfecttensewhentheexacttimeofanactionisnotclearorimportant.Weuseitwithtimeexpressionssuchas:already,ever,for,just,lately,never,recently,since,yet.Notes:1.Weusealreadyforaffirmativestatementsandyetfornegativestatemen

8、tsandinterrogativesentences.2.Weusefor+aperiodoftimeandsince+apointoftime.Notes:3.Structuresconnectedwiththepresentperfecttense:①Itis(hasbeen)+aperiodoftime+since-clause.②This(That