初中课件-现在完成时讲解-对比-练习.ppt

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,*,1,、现在完成时不可与表示特定过去时间的副词连用。,e.g.1,、,I,(leave)Shanghai for 3 days ago.,I,Shanghai for 3 days.,2,、,Tom,(catch)a cold yesterday.,Tom,for 3 days.,2,、过去时只限于表示过去的动作本身，与现在的结果无关。,e.g.When did he come?,When has he come?,3,、现在完成时不与疑问副词,when,连用，而一般过去时则可以。,e.g.He has bought a house.,He bought a house five ago.,(),(),如：,ago,last week,then,yesterday,just now,a moment ago,等,.,现在完成时,VS,一般过去时,现在完成时（三）,现在完成时,构成,用法,常用状语,have+,动词过去分词,has+,动词过去分词,表示某一动作或状态,从过去某一时间一直,持续到现在,fo,r+,一段时间,si,nce+,过去某一时间,现在完成时,(have/has+v-ed),1.,表示刚刚结束的动作,常和,already,just,yet,now,not yet,等连用,.,2.,表示过去发生的动作对目前所造成的影响,.,3.,表示经验经历,常和,ever,never,often,always,once,twice,three times,before,等连用,.,现在完成时,(have/has+v-ed),4.,表示从过去持续到现在的动作或状态,常和,since+,过去时,for+,时间段,recently,lately,these days,this week,in the past few days,during the last two weeks,so far,up to now,until now,等连用,.,例如,:,Theyve known each other,since 1995,.,(2)Tony has studied Chinese,for a year,.,现在完成时,(have/has+v-ed),5.,区别,:have/has been to,表示去过某地,已经回来,;have/has gone to,表示去了某地,还未回来,.,例如,:,Betty,has been to,China.She knows a lot about Chinese culture.,-Wheres Mr Yu?-He,has gone to,Beijing.He will be back in a week.,现在完成时,(have/has+v-ed),6.,注意,:,当现在完成时跟表示持续的时间状语连用时,不能使用终止性动词,.,(1)Tom has come for two hours.,(,),(2)Tom has been here for two hours.,(,),下面我们来看看，如何把,终止性动词,转换成,延续性动词,.,终止性动词,转换成,延续性动词,become,be,buy have,borrow keep,catch a cold,have a cold,get to know know,put on wear,leave,be away,die be dead,arrive in/at be in/at,come to be in/at,join be a member of/be in,start be on,finish be over,have bought-have had,have left-have been away from,have borrowed-have kept,have joined-have been in,have come to/got to/reached/arrived(in/at)/moved to,-have been(in)/have stayed(in/at),延续性动词,-,非延续性动词,现在完成进行时表示过去已经开始，一直持续到现在的动作或状态。因为表示的是持续的动作或状态，所以使用的动词通常是延续性动词,时间状语通常由,for,或,since,引导,.(,非延续性动词不能直接和,for,或,since,连用,),短暂性动词转延续性动词：,borrow,die,marry,come,begin to do,become,close,keep,be dead,be married,be here,do,be,be closed,短暂性动词转延续性动词：,begin,buy,finish,go,leave,join,open,be on,have,be over,be there,be away from,be in,be open,终止性动词,转换成,延续性动词,I,became,a teacher,in 2001.,I became,a teacher,7 years ago.,I have been,a teacher,since 2001.,I have been,a teacher,for 7 years.,终止性动词,转换成,延续性动词,He,bought,a computer,last week.,He has had,a computer,since last week.,He has had,a computer,for a week.,终止性动词,转换成,延续性动词,She,borrowed,a book,in July.,She borrowed,a book,two months ago.,.,She has kept,the book,since July.,She has kept,the book,for two months,终止性动词,转换成,延续性动词,Tom,caught,a cold,yesterday.,Tom has had,a cold,since yesterday.,Tom has had,a cold,for a day.,终止性动词,转换成,延续性动词,Betty,got to know,Tony,in 2001.,Betty met,Tony,in 2001.,.,Betty has known,Tony,since 2001.,Betty has known,Tony,for 7 years,终止性动词,转换成,延续性动词,My brother,put on,his glasses,when he read newspapers.,My brother has worn glasses since 2005.,My brother has worn glasses for 3 years.,终止性动词,转换成,延续性动词,They,left,the space station,last Monday.,They have been away from,the space station,since last Monday.,They have been away from,the space station,for two days.,终止性动词,转换成,延续性动词,His grandfather,died,in 2004.,His grandfather,died,four years ago.,His grandfather has been dead,since 2004.,His grandfather,has been dead,for four years.,终止性动词,转换成,延续性动词,The orchestra,arrived in,Dalian,last week.,The orchestra,arrived in,Dalian,a week ago.,The orchestra has been in,Dalian,since last week.,The orchestra has been in,Dalian,for a week.,终止性动词,转换成,延续性动词,His parents,came to,China,last month.,His parents,have been in,China,since last month.,His parents,have been in,China,for a month.,终止性动词,转换成,延续性动词,Charlie joined,the army,in 2006.,Charlie has been in,the army,since 2006.,Charlie has been a,soldier,for two years.,Charlie joined the League in 2006.,Charlie has been in the League since 2006.,Charlie has been a member of the League for two years.,终止性动词,转换成,延续性动词,The film,started,at 7 oclock.,The film has been on,since 7 oclock.,The film has been on,for half an hour.,终止性动词,转换成,延续性动词,The football math,finished,at 5.,The football math has been over,since 5 oclock.,The football math has been over,for 20 minutes.,I have bought this bike for 2 years.,2.He has borrowed this book for 3 days.,3.She has got here since 10 oclock.,4.They have left their hometown since 2000.,5.We have come to the city for a week.,6.LiQiang has joined the army since he was 18 years old.,I,have had,this bike for 2 years.,He,has kept,this book for 3 days.,She,has been,here since 10 oclock,.,They,have been away from,their hometown since 2000.,We,have been in,the city for a week,.,Li Qiang,has been in,the army since he was 18 years old.,Lets review!,单项选择。,I _ a teacher for ten years.,A.am B.have been C.be,2.I _ the last page of the book last night.,A.read B.have read C.am reading,3.He _ the Army in 1999.,A.has joined B.joins C.joined,4.Project Hope _ 2,000,000 people since 1989.,A.trained B.has trained C.train,5.Mary and Jack _ each other for nearly 12 years.,A.know B.knew C.have known,6.Its important for me _ a good mark in the exam.,A.to get B.get C.getting,