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,#,Present perfect tense,现在完成时,构成,:,用法一：,表示过去发生的某一动作对现在造成的影响或产生的结果,.,现在完成时这一时态强调是过去动作与现在的联系,也就是强调现在的影响和结果,.,have/has,+,过去分词,1,Present perfect tense 现在完成时构成,现在完成时,:,have/has+,过去分词,1),表示到现在为止已经完成或刚刚完成的动作。,Now we have planted all the trees.,He has just come back.,2,现在完成时:2,2),表示过去发生的动作,但强调结果或对现在的影响。,Have you had your supper?,I have read the book twice already.,在以上两种用法中常跟,already,notyet,never,just,before,ever,recently,等时间继续下去的状语。,3,3,3),表示过去已经开始,持续到现在,也许还会继续下去的动作或状态，常与包括现在在内的一段时间的状语连用。,He has studied English,for 6 years,.,Mary has been busy,since,she came back from Hangzhou.,4,3)表示过去已经开始,持续到现在,也许还会继续下去的动,过去分词的构成,1.,直接加,-ed,。如：,play-played,2.,以字母,e,结尾的直接加,d,。如：,name-named,3.,以辅音字母加,y,结尾的，变,y,为,i,加,ed,。如：,carry-carried,4.,重读闭音节且末尾只有一个辅音字母，双写这个辅音字母再加,-ed,。如：,stop-stopped,5,过去分词的构成 1.直接加-ed。如：play-playe,I,have eaten,my lunch.,She,has eaten,her lunch.,He,has eaten,his lunch.,肯定句,They,have eaten,their lunch.,6,I have eaten my lunch.She has,I have not(havent)seen the film.,She has not(hasnt)seen the film.,现在完成时的,否定,形式：,have not(havent)+,过去分词,has not(hasnt)+,过去分词,I havent eaten supper.,eat-eaten,He hasnt changed his idea.,change-changed,My mother hasnt come back home.,come-come,否定句,7,I have not(havent)seen the,Ive already had dinner.,I _ _ dinner _.,2.He has just finished his homework.,He _ _ his homework _.,3.Mums cooked the dinner.,Mum _ _ the dinner.,4.Susans learned English at school.,Susan _ _ English at school.,havent,had,yet,hasnt,finished,yet,hasnt cooked,hasnt,learned,把下列句子改为否定句,8,Ive already had dinner.haven,Have you eaten your breakfast?,现在完成时的一般疑问句形式,Have/has,提前,+,过去分词,Have you known Sandy for a long time?,Yes,I have/No,I havent.,know-known,Has she eaten anything since 9:00 a.m.,Yes,she has/No,she hasnt.,eat-eaten,疑问句,9,Have you eaten your breakfast?,Ive already had dinner.,2.He has just finished his homework.,3.Mums cooked the dinner.,4.Susans learned English at school.,Have you had dinner yet?,Has he just finished his homework?,Has mum cooked the dinner?,Has Susan learned English at school?,把下列句子改为一般疑问句,10,Ive already had dinner.Have y,分清与一般过去时的用法,现在完成时属于现在时态的范围，,不能,和表示过去的时间状语连用，如,yesterday,last night,three weeks ago,in1990,等,.,而一般过去时只表示过去的动作或状态，和现在不发生关系。,eg-I have seen the film.,eg-I saw the film last week.,eg-He has lived here since 1993.,eg-He lived here in 1993.,11,分清与一般过去时的用法11,1.,都表示过去发生的事,2.,现在完成时强调过去和现在的联系，不能和具体的时间状语连用；,3.,一般过去时强调过去发生的事或状态与表示过去的具体时间连用（,last,ago,yesterday,etc.,）,present,past,I have lived here for two years,I lived there 2 years ago,12,1.都表示过去发生的事presentpastI have l,eg.1.He had his breakfast at 6:00,He has had his breakfast.,2.When did you come here?,I watched the football match on TV at 9:00.,13,eg.1.He had his breakfast at,动词填空：,1._ you _(clean)the room?,Yes,we_(do)that already.,When _ you _(do)it?,We _(do)it an hour ago.,2._ he _(see)this film yet?Yes.,When _ he _(see)it?,He _ it last week.,3.How many times _you_(come)here?Once.,Have,cleaned,have done,did,do,did,Has,seen,did,see,saw,have,come,14,动词填空：Havecleanedhave donediddo,4.I _(read)the novel twice.Its interesting.,5.She _(go)to Pairs,hasnt she?Yes.,How _ she _(go)there?,She _(go)there by air.,6.So far,many countries _(develop),their software programs.,7.Mr Chen _(give)up smoking last year.,8._ you ever _(ride)a horse?Never.,9.He _(keep)the book since two days ago.,have read,has gone,did,go,went,have developed,gave,Have,ridden,has kept,15,4.I _(read)the novel,练习题,:,1.Its a long time since we _(meet)last,isnt it?,2.-I know you _(choose)a picture book among these.,-Yes,Have a look at it,please.,3.,So far,spaceships without people _(reach)the moon and some other parts of the universe.,4.My father_ home for nearly three weeks.A.has gone away from B.has leftC.has been away from D.went away,5.Mr.and Mrs.Green have_in China for a week.A.been B.got C.arrived D.reached,met,have chosen,have reached,C,A,16,练习题:methave chosenhave reach,Adverbs of time,before,by now(so far),once,twice,just,recently,yet(,否,/,疑,),already(,肯,),ever,never,all ones life,in/during the past/last 5 years,17,Adverbs of time befor,Exercises,1.I _(have)lunch already,.,2.Has the train_(arrive),yet?,3.Tome _ never_(be to)China.,4.The twin _just _(see)my father.,5.The twins _(see)my father just now.,6.Many tall buildings _(build)in the past 5 years.,have had,arrived,has,been to,has,seen,saw,have been built,18,Exercises1.I _(have),用法二,：,for+,段时间,since+,点时间,since+,句子（过去时）,E.g.Kate has lived here,for,3 years.,Kate has lived here,since,3 years ago.,Kate has lived here,since,she came to China.,表示过去某个时间开始的动作或存在的状态，一直持续到现在并可能还将持续下去。动词使用延续性动词。常与,for,或,since,引导的时间连用,19,用法二：表示过去某个时间开始的动作或存在的状态，一直持续到现,练习题,:,1.Its a long time since we _(meet)last,isnt it?,2.-I know you _(choose)a picture book among these.,-Yes,Have a look at it,please.,3.,So far,spaceships without people _(reach)the moon and some other parts of the universe.,4.My father_ home for nearly three weeks.A.has gone away from B.has leftC.has been away from D.went away,5.Mr.and Mrs