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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,The Present Perfect Tense,一.,Form:,1.肯定句:,S(,主语)+,have/has+PP(,过去分词),2.否定句:,S(,主语)+,have/has+,not,+PP(,过去分词),3.疑问句,Have/has+,S(,主语)+,PP(,过去分词)?,Yes,S+,have/has,.,No,S+,have/,hasn,t,.,说明,：,助动词,have,和,has,可前面的主语缩略为,ve,s,.,如,they,ve,we,ve,hes,its;has not=,has,n,t,have not=have,nt,二、,过去,分词的构成,1.,+,ed,work,plant,call,2.,e+d,live,change,like,love,agr,ee,save hate,move,arrive,skate,hope,use,3.以重读闭音节结尾，末尾只有一个辅音字母的,双写,ed.,如：,plan,stop,drop,fit(,适合),prefer(,更喜欢),travel,。以,辅音字母,y，,结尾,，变,y,为,ied,try,study,carry,hurry,cry,worry,copy,三、特征词,already,(,肯定句),yet,(,否定句和疑问句),never,，,ever,(,疑问句),just,(,谓语动词之前),before,(,句末）,in the past/last few years,(,过去几年来),so far=up to now,till now,by now,these days,since/ever since,for+,时间段,四、用法,表示过去发生的某一动作对现在造成的影响或结果。,I,have,already,seen,the film.,Jim,has,just,lost,his book.,四、2.常和表示从过去某一时刻延续到现在的一段时间的状语连用.如：,for+,时间段,for12 weeks/three minutes,since+,时间点(起点),since 9 oclock this morning,since,一段时间,ago,for,时间,段,;,since,two weeks,ago,=,for,two weeks;,for,a year=,since,a year,ago,;,since 2000=for 4 years,since+,从句,(常,用一般过去时,),The Greens,have lived,in Beijing,since,they move,d,to Beijing from Paris.,时态填空：,-,Are you sure you _(lose)the book?-Yes,I _(look)for it everywhere,but I still cant find it.,have lost,have looked,2.,We _ already _(copy),these words.,have,copied,3.,Jim _,(just,watch)a football match.He is so tired and hungry.,has just watched,4._,you ever _(travel)on a train?,Have,travelled,5,.-_,they _,(see)the film yet?,-Yes.They_,(see)it already.,-When_they_,(see)it?-They _,(see)it just now.,-,Have,seen,have seen,did,see,saw,6.-_,her sister _,(be)to,Nanning,?,-No,she_,(never,be)there before.,Has,been,has never been,五。瞬间动词和延续性动词的转换,open-,be,open;close-,be,close,d,;begin-,be on,;finish,end-,be over,become-,be,;,join-,be,a member,of,be in,;,die-,be dead,;,get up-,be,up;,comearrivereach,get to-,be in/be here,;catch a cold-,have,a cold,come back,be,back,sleep/fall asleep-,be,a,sleep;,buy-,have,;,borrow-,keep,;,leave-,be away,;,
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