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1、PresentPerfectTense一、什么叫现在完成时1.IhavejustlentmybooktoJohn.(Idon’thavethebooknow.)现在完成时表示动作发生在过去，但和现在情况有关，既用一个发生在过去的动作来说明现在的情况。2.Myunclehaslivedinthatstreetsincehecametothiscity.(Hebegantolivetheremanyyearsago,helivestherenowandhewillgoonlivingthere.)二、现在完成时的构成1.Jackhasgonetothecinema.2.Theyhavefini
2、shedtheirhomework.助动词have/has＋过去分词Jackhasn’tgonetothecinema.HasJackgonetothecinema?Yes,hehas./No,hehasn’t.Havetheyfinishedtheirhomework?Yes,theyhave./No,theyhaven’t.Theyhaven’tfinishedtheirhomework.现在完成时用法（一）过去的(结束性)动作产生的影响或结果现在还存在。常用短暂性动词做谓语动词.如arrive,get,finish,borrow,open,stop,begin,go,come,die
3、,fall,…时间状语常用already,just,yet,ever,before,once(一次),recently等不具体的过去时间或不带有时间状语三、现在完成时的用法1.表示过去发生或已经完成的某一动作对现在造成的影响或结果。-Haveyouhadyourlunchyet?-Yes,Ihave.Ihavejusthadit.(现在不饿了。)Ihavealreadypostedthephotos.(照片已不再我这里了)MarywithhisfamilyhasneverbeentoChinabefore.-Havetheyeverheardofthestory?-No,notyet.Ad
4、verbsoftimebefore,bynow(sofar),到目前为止once,twice…,just,recentlyyet(否/疑),already(肯),ever,never,曾经，从不Exercises:一、按要求变化下列各句。1.Shehaslistenedtoapieceofforeignmusic.（否定句）2.Ihavegotsomethingimportanttodo.（一般疑问句）3.Haveyouevertraveledonatrain?（否定回答）Shehasn’tlistenedtoapieceofforeignmusic.Haveyougotanythingi
5、mportanttodo.Hehasalreadyfinishedastorybook.4.Hefinishedreadingastory-book.（改成现在完成时）5.LiLeihaseatensomedumplingsforhisbreakfast.（对划线问）6.I’veworkedoutthemathsproblem.（对划线部分提问）Whohasworkedoutthemathsproblem?WhathasLileieatenforhisbreakfast?No,Ihaven’t.二、用所给动词的适当形式填空。1.--Areyousureyou________(lose)th
6、ebook?--Yes.I_________(look)foriteverywhere.ButIstill_______(cannot)findit.2.--_______you_________(take)themedicineyet?--Yes,I_________(take)ithalfanhourago.3.I_____________(never,meet)hersisterbefore.4.He______________(just,watch)afootballgame.Heissotiredandhungrynow.5.--Howmanytimes________you__
7、______(read)thisbook?--I_________(read)itseveraltimes.havelosthavelookedcan’tHavetakentookhavenevermethasjustwatchedhavereadhaveread6.Mybrother________(buy)acarlastmonth.7.--WhereisJoan?--She_________(go)tothecin
