北京市五十七中学高中英语 Unit 2 Heroes Present Perfect &Past Simple课件 北师大必修1.ppt
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1、Present perfectobjectiveTo use the Present Perfect and Past Simple tenses appropriately.1.Since then,she has won Wimbledon and2.the US Open twice.2.Has tennis ever caused problems between the sisters?3.The sisters father,Richard,started to train Venus and Serena when they were young children.4.The f
2、irst time Venus played in a big event was in 1996.has wonHascausedstartedplayedHave A L k1.Since then,she _(win)Wimbledon and the US Open twice.2._ tennis ever _(cuase)problems between the sisters?3.The sisters father,Richard,_(start)to train Venus and Serena when they were young children.4.The firs
3、t time Venus _(play)in a big event was in 1996.Fill in the blanks.Hascausedhas wonstartedplayed用括号内所给动词的正确形式填空。用括号内所给动词的正确形式填空。1.Mr.Brother is an actor.He _(appear)in several films so far.2.Sales of CDs have greatly increased since the early 1990s,when people _(begin)to enjoy the advantages of this
4、new technology.3.Do you know our town?No,this is the first time I _(be)here.has appearedbeganhave been4.We _(not meet)our new neighbors yet,so we dont know their names.5.Have you been to Australia?Yes.I _(be)there three times.And I _(go)there with my uncle for the first time.6.My friend,who _(serve)
5、on the International Olympic Committee all his life,is retiring next month.havent methave beenwenthas servedPast Simple:to talk about finished actions or past situations and habits.He always phoned on Friday.She climbed the stairs and went to her room.always phonedclimbedwentPresent Perfect:to talk
6、about past events and activities with results or consequences in the present:发生发生在过去但对现在有影响的动作在过去但对现在有影响的动作 Ive lost my keys.(I cant open the door.)(我现在不能开门。)我现在不能开门。)a single or repeated action in the past,often with time adverbials such as often,sometimes,when we dont know or are not interested in
7、 exactly when they happened.Ive walked across the Amazon jungle.(我何时做的此事无关紧要我何时做的此事无关紧要)现在完成时及其时间状语现在完成时及其时间状语 before,ever,never,seldom,sometimes,often,usually,just,so far,up to now,recently1.Have you ever been to Beijing?2.Weve never heard the story before.3.Have you heard from your family recently
8、?4.Peter has written two novels so far.5.There has been too much rain this year.6.The friendly relations and cooperation between our two countries have been enhanced in the past few years.7.Up to the present everything has been successful.Look at the dialogue below and complete the rule with already
9、 or yet.A:Has Serena won Wimbledon yet?B:No,she hasnt won it yet.A:Has she won the US Open yet?B:Yes,she has already won it.yetalreadyyetyeta)We use _ in affirmative sentences.b)We use _ in questions and negative sentences.alreadyyet使用现在完成时的句型使用现在完成时的句型1)现在完成时现在完成时+since+点时间状语点时间状语(名词、名词、短语、从句短语、从句,
10、其中从句用一般过去时其中从句用一般过去时)2)现在完成时现在完成时+for+段时间状语段时间状语 3)It/This is the first/其他序数词其他序数词/last time+that 从句中从句中,从句使用现在完成从句使用现在完成时。时。Ive lived in this town since 1990.Weve known each other since we were at school.This is the first time we have seen a film inthe cinema together as a family.Its the third time
11、 Bill has phoned his girlfriend this evening.Ive lived in this town for ages.I havent seen him for ten years.现在完成时表示某一已经完成的动作现在完成时表示某一已经完成的动作对现在造成的结果或影响,强调的是对现在造成的结果或影响,强调的是现在的情况,所以不能与表示过去的现在的情况,所以不能与表示过去的时间状语连用;一般过去时只表示某时间状语连用;一般过去时只表示某一动作或状态在过去发生或存在过,一动作或状态在过去发生或存在过,与现在不发生联系,它可以与表示过与现在不发生联系,它可以与表示
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