1126高一英语（TSyy26GI） (2).ppt

have has done thepresentperfecttense grammar i theboyisveryhappy theboy catch abird connectionwiththepast theboycaughtabird connectionwiththepresent theboyishappy hascaught eric alreadyopen thedoor hasalreadyopened look thewindowisopen ericopenedthewindowjustnow weusethepresentperfecttensetotalkaboutthingsthathappenedintherecentpast butareconnectedtothepresent summary 1 thedisappearanceofjustinehasmadekellyveryunhappy hi mstan howlonghasmrjianglivedinchangsha hehaslivedhereforovertenyears camehaslived pastnowfuture summary 2 weusethepresentperfecttensetotalkaboutsomethingthatstartedinthepast andisstillhappeningnow ihave tseenjustinsincelastfridaynight theboysaretired they justplay aballgame connectionwiththepast theboysplayedaballgameafewminutesago connectionwiththepresent theboysaretired havejustplayed weusethepresentperfecttensetotalkaboutactionsthatwerecompletedonlyashorttimeago summary 3 thepolicehavejustfinishedsearchingthearea iwenttoegyptin1986 iwenttoegyptin2004again i be toegypttwice havebeen wecanalsousethepresentperfecttenseforrepeatedactions summary 4 somevillagerssaythattheyhaveseenufosmanytimes weusethepresentperfecttensewhentheexacttimeofanactionisnotclearorimportant weuseitwithtimeexpressionssuchas already ever for just lately never recently since yet summary 5 theboyhasalreadycomehome ihaven theardanythingfromhimyet wehaven tseenhimfortwoyears wehaven tseenhimsince2002 wesawhimin2002 weusealreadyforaffirmativestatementsandyetfornegativestatementsandinterrogativesentences 2 weusefor aperiodoftimeandsince apointoftime notes 过去时与现在完成时的区别 1 you mypen yes i itonyourdeskjustnow see 2 you dinner yes i itwithmary have 3 thepostman yetthismorning come thepostman thismorning come had saw 4 ican tfindmycd where you it i itintheleftdrawer put 5 thisisthefirsttimethatthestudents tohydepark go 6 he greatprogressinthepasttwoyears made 7 they ahardlifeinthepast live haveput