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1、Language,The present perfect tense,现在完成时,1.表示过去发生的某一动作对现在造成的影响.常与already,yet,ever,never,just,before,recently连用。,past,now,future,He has already seen this kind of food in his country.,They havent come back yet.,影响,(We cant find them.),(He knows this kind of food.),肯定式S+have/has+Vpp.,否定式S+have/has not+
2、Vpp.,疑问式Have/Has+S+Vpp?,Form（结构）of the Present Perfect Tense,肯定回答：Yes,S+have/has.否定回答：No,S+havent/hasnt.,past,now,future,I have lived here since I came here.,She has been in Canada for seven years.,2.过去某一动作持续到现在(可能会持续下去)，常与since和for连用，表示持续动作或状态的词应是延续性动词.,since vs.for,I have not laughed like this sin
3、ce my childhood.The Greeks have tried to capture our city for ten years.,We use since with(a period of time/a point in time).We use for with(a period of time/a point in time).,时间点,一段时间,since和for有时两者可以进行同义句转换，但必须注意后面加的时间状语。,I have been here for 4 years.=I have been here since 2010.=I have been here s
4、ince 4 years ago.,since+从句(常用一般过去时),The Greens have lived here since they moved to Beijing.,She has been in this city since she came to China.,常考点：现完+since+一过,I have bought the book for a week.I have had the book for a week.,buy是短暂性动词,have是延续性动词,They have come here for two days.,They have been here
5、for two days.,be是延续性动词,come是短暂性动词,当句子包含的时间状语含有since和for时，动词必须用延续性动词。非延续性动词又叫短暂动词或瞬间动词-不能和一段时间连用,短暂性动词与延续性动词的转换,come-,have been here,die-,have been dead,buy-,have had,borrow-,have kept,open-,have been open,close-,have been closed,start/begin-,have been on,Join/take part in-,have been a member of+组织/i
6、n+组织,-,go/leave-,have been away(from),have been to have gone to,曾经到过某地,已经去了某地,He has been to Beijing.,He has gone to Beijing.,（他现在已经回来了）,（他现在不在说话现场）,他到北京已有2天了。He has come to Beijing for two days.He has been in Beijing for two days.常考点：have been in来到某地/一直在某地,have/has been(to)have/has gone(to),-,-Wher
7、e is your father?-He isnt here now.He _ _ to work.,2.-Have you travel abroad?-Yes,I _ _ to America twice.,has gone,have been,1.She isnt here now because she _ the zoo.A.has been to B.have gone to C.has gone to2.The Greens _ Guilin twice.A.have been to B.have been in C.has been in3.Lily has made lots
8、 of friends since she _ here.A.come B.has been C.came D.coming,Exercise,C,A,C,4.My parents _ in Beijing since 1995.A.are living B.have lived C.lived5.His grandma _ for 2 years.A.died B.has died C.was dead D.has been dead,B,D,现在完成时 vs.一般过去时,I have studied history for two years.I had a history lesson
9、yesterday.2.I have already learnt a lot about Greek history.I read the story of the Trojan War last week.,We use(the present perfect tense/the simple past tense)to talk about a past experience which has a connection to the present.,We use(the present perfect tense/the simple past tense)to talk about
10、 a completed action in the past.,I have lost my watch.,I lost my watch yesterday.,现在完成时表示过去发生的某一动作对现在造成的影响或一直持续到现在,强调与现在的关系,不能够与in1998,three days ago 和just now 等明确的过去的时间状语连用.,一般过去时只是表示动作是发生在过去,和现在并没有什么直接与必然的联系,因此一般过去时是可以和表示明确的过去的时间状语连用.,现在完成时 vs.一般过去时,Read and complete（P89B1）,have gone,left,came,hav
11、e tried,have won,have left,didnt take,B2 Complete the diary（P89B2）.,bought,went,opened,never been,have,visited,have seen,bought,have read,1.规则动词的过去分词为-ed(与过去式相同),talk-live-study-plan-,past participle 过去分词,talked-talked,lived-lived,studied-studied,planned-planned,原形 过去式 过去分词,2 不规则动词的过去分词,A-A-A,burn,cost,cost,hit,hit,hit,A-A-B,beat,beat,beaten,A-B-B,cost,burnt,burnt,keep,kept,kept,meet,met,met,A-B-C,be,was/were,been,do,did,done,come,came,come,A-B-A,past participle 过去分词,
