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1、8BUnit1Pastandpresent(Grammar2)教学目标：1.Tolearnsomenewwords.2.Tolearntheuseofthepresentperfecttense.重点难点：短暂性动词和延续性动词的区别、用法及转换教学过程：Step1.Checkthehomework.Step2.Addsomeirregularverbs.become—became---becomechoose—chose—chosencost—cost—costdrink—drank—drunkfeel—fel
2、t—feltgive—gave—givengrow—grew—grownhurt---hurt—hurtlend---lent---lentpay---paid---paidmeet---met---metStep3.Explainthegrammar.短暂性动词（瞬间性动词）由于动作不能延续，故不能与表示一段时间的状语for…或since…连用。常见的短暂性动词有：go,come,borrow,open,close,stop,join,marry,die,become,arrive,reach,begin,st
3、art,leave,receive,buy,put,lose，lend,find,finish等。如果表达上述短暂性动词“继续多长时间”的概念，则需要改用与之相应的表示状态的系表结构，这种系表结构多为be+形容词（副词、介词短语等）构成，试比较：误：Hehascomehereforsevenyears.正：Hehasbeenhereforsevenyears.Hecameheresevenyearsago.误：Thisfactoryhasopenedforseveralyears.正：Thisfactoryhas
4、beenopenforseveralyears.(open是形容词，表示“开”的状态。)Thisfactoryopenedseveralyearsago.(close→beclosed用法同上)类似的词还有：die→bedead 误：Hisfatherhasdiedfortwomonths.正：Hisfatherhasbeendeadfortwomonths/sincetwomonthsago. orHisfatherdiedtwomonthsago. buy→have误：Samhasboughtt
5、heknifeforaweek.正：Samhashadtheknifeforaweek/sinceaweekago.orSamboughttheknifeaweekago.getup→beup误：XiaoMinghasgotupforanhour.正：XiaoMinghasbeenupforanhour.orXiaoMinggotupanhourago.leave→beawayfrom误：Shehasleftherefortwoyears.正：Shehasbeenawayfromherefortwoyears.o
6、rSheleftheretwoyearsago. borrow→keep误：Tomhasborrowedthebookfortwodays.正：Tomhaskeptthebookfortwodays.or Tomborrowedthebookthedaybeforeyesterday. join→bein+组织/bea…..member误：MybrotherhasjoinedtheLeague/army/Partyfor10years.正：MybrotherhasbeenintheLeague/
7、army/Partyfor10years/since1995.orMybrotherhasbeenaLeaguemember/soldier/Partymemberfor10years/since1995.orMybrotherjoinedtheLeague/army/Partyin1995.start/begin→beon误：Thefilmhasbegunfortenminutes.正：Thefilmhasbeenonfortenminutes.orThefilmbegantenminutesago.comeb
8、ack→beback误：Hehascomebackforthreedays.正：Hehasbeenbackforthreedays.orHecamebackthreedaysago. marry→bemarried误：Theyhavemarriedfor15years.正：Theyhavebeenmarriedfor15years.orTheygotmarried15y
