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1、现在完成时态---PresentPerfectTense现在完成时用法一表示:过去发生的动作对现在造成的影响和结果.构成:have/has+过去分词时间状语:already,yet,never,ever,before,justalready和yet的区别表示过去发生的某个动作对现在造成的影响或结果。Haveyoufinishedyourworkyet?Yes,Ihave.I’vejustfinishedit.I’vealreadyfinishedit.No,Ihaven’tfinishedityet.现在完成时谓语动词的构成：助动词have/has(not)+V-ed（P.P.过去分词）I__
2、____________(finish)thecompositionalready.He___________(learn)Englishforthreeyears.We/You/They….She/It….havefinishedhaslearnedCanyoufindoutthesentencesofthepresentperfecttense?1.You’vemissedhim.2.He’sjustleft.3.You’vejustmissedit.4.He’sjustgone.5.I’veonlyjuststarted.6.I’vehadasillymorning.7.I’vejust
3、followedyoualloverthecity.时间状语：already-yetever-neverjustonce/twicebeforeI________(do)myhomeworkalready.He_____________(notfinished)hishomeworkyet._______youever______(be)toHaiwaii?We______never______(see)suchanexcitingmatchbefore.Mother_____just_______(clean)thehouse.Pleasedon’tcomein.They__________
4、_______(practice)thisdialoguetwice.I_________(see)thisgirlbefore.havedonehasnotfinishedHavebeenhaveseenhascleanedhavepracticedhaveseenalready和yet的区别yet只用于否定句和疑问句当中,yet表示“已经”,not…yet表示“还没有”1.I’mnotreadyyet.2.Haveyoufinishedyourhomeworkyet?already也表“已经”,强调动作的完成,常与肯定的陈述句连用(可用于疑问句,表示惊讶)1.Ihavealreadyrea
5、dthebookfourtimes.2.Haveyoufinishedlunchalready?It’sonly11o’clock!现在完成时用法二◎表示:过去发生的动作,一直延续到现在,甚至有可能继续延续下去.◎时间状语:通常和for,since引导的时间状语连用.◎for和since的区别用法2：表示动作或状态从过去开始一直持续到现在甚至将来Jeffborrowedthebookstwodaysago.Jeffhaskeptthebooksfortwodays.标志时间短语：for+一段时间,since+过去的时间点,theseyears,sofar,inthepast/last… yea
6、rsWe__________(learn)Englishforthreeyears/sincetwoyearsago/since2000.Mr.Green_________(be)inChinatheseyears.They____________(write)15songssofar.Thepopulation____________(grow)moreslowlyinthepasttenyears.havelearnedhasbeenhavewrittenhasgrown选用for和since填空:1.Wehaven’tseeneachother______alongtime.2.Hisf
7、atherhasbeenintheParty______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severalyears.6.It’sfiveyears_______wemetlasttime.f
