现在完成时与过去完成时-课件.ppt

1、基本时态构成时态语态时态语态主动主动被动被动1一般现在时一般现在时V/do/doesIs/am/are done2现在进行时现在进行时Be doingIs/am/are being done3现在完成时现在完成时Have/has doneHave/has been done4一般过去时一般过去时VedWas/were done5过去完成时过去完成时Had doneHad been done6过去进行时过去进行时Was/were doingWas/were being done7一般将来时一般将来时Will/shall doWill/shall be done精选 The Past Perfec

2、t Tense过去完成时态过去完成时态精选1.现在完成时态表示过去发生的动作对现在造成的影响或现在完成时态表示过去发生的动作对现在造成的影响或结果结果 Our teacher has left.We have studied English.I have already finished the homework.He has had his lunch.He has become a doctor.have/has+过去分词过去分词精选2.某个动作从过去已经开始某个动作从过去已经开始,一直持续到现在一直持续到现在,还有可能持续到还有可能持续到将来将来.动作的持续性要通过一段时间来表示动作的持

3、续性要通过一段时间来表示.一段时间的表达方法有两种一段时间的表达方法有两种:for:+一段时间一段时间 for a year for two weeks for three yearsSince 过去的某一时刻过去的某一时刻,since nine since last week 一般过去时态的时间状语从句一般过去时态的时间状语从句 since you came since you got home.注意注意:for 和和since 所引导的时间状语都表示一段时间所引导的时间状语都表示一段时间.He has been away since last week.He has been away f

4、or one week.对划线部分提问都用对划线部分提问都用How long精选助动词助动词+过去分词过去分词助动词助动词+过去分词过去分词 构成？构成？精选 精选精选 精选精选精选过去完成时与现在完成时二者用法基本相同，但现在完成时以现在时间为基点，过去完成时则以过去的时间为基点，与现在无关，即过去的过去。过去完成时常用于宾语从句中;Summary精选结构：结构：助动词助动词 had+p.p.(过去分词过去分词)用法：表示过去某一时间和动作之前已经发生或完成用法：表示过去某一时间和动作之前已经发生或完成 了的动作或一直持续的动作了的动作或一直持续的动作(过去的过去过去的过去)。By the

5、end of last term,we had learned 600 English words.He said he had finished his homework.The film had already begun when we got to the cinema.I had studied English before I came here.When I came to GZ,he had been there for a long time.精选过去完成时态的标志：过去完成时态的标志：1.和和 by+过去时间点连用过去时间点连用,如：如：by the time,by the

6、n,by last year,by the end of last year/month,by five oclock yesterday evening By the end of last term,they _(learn)10 English words.2.和和before+过去时间点连用过去时间点连用We _(arrive)the station before ten oclock.had arrived3.常用于宾语从句中常用于宾语从句中 She said that she _(write)three e-mails.had written精选4.和和when,before,af

7、ter,as soon as,until/till等引导的状语等引导的状语 从句连用或用于从句中从句连用或用于从句中 The airplane _ already _(leave)when I got to the airport.5.根据上下文判断根据上下文判断 I went to Li Hongs house,but he _(go)out.had lefthad goneLast night,as soon as I _(finish)my work,I went to sleep.had finished精选Fill in each blank with the proper verb

8、 form:1.He said that he _(write)that letter.2.Before he arrived,the train _(leave).3.By then,they _(work)for eight hours.4.When she got to the cinema,the film _ already _(be)on for 15 minutes.5.Mary told me she _(meet)my mother before.6.By six oclock yesterday evening,I _(finish)my homework.7.I went

9、 to Li Hongs house,but he _(go)out.8.We _(arrive)at the station before two oclock.had writtenhad lefthad worked had been had methad finishedhad gonehad arrived精选1.After he _(finish)his work,he went out.finished2.Annie told me that his father _(go)to Paris and he _(come)back in a few days.had gonewou

10、ld come3.My friend _(buy)the car two years ago.He _(have)it for two years.boughthas hadFill in each blank with the proper verb form:4.Before they arrived here,the film _ already _(start).hadstarted精选Fill in each blank with the proper verb form:A:_ you _(finish)your homework?B:Yes,I have.A:What had y

11、ou done before you finished your homework?B:I _(watch)TV.A:What _ you _(do)now?B:I _(write)a letter to my friend Tom.A:_ you often _(write)to him?B:Yes.And he often _(write)to me.I _(get)a letter from him yesterday.So I _(answer)his letter now.A:When _ you _(post)it?B:I _(post)it as soon as I _(fini

12、sh)writing.Have finishedhad watchedare doingam writingDo writewriteswill postgotam answeringwill postfinish精选1.过去完成时态的肯定式，否定式，疑问式和简短回答：过去完成时态的肯定式，否定式，疑问式和简短回答：I had had my breakfast before six oclock this morning.I hadnt had my homework before six oclock this morning Had you had your breakfast befor

13、e six oclock this?Yes,I had.No,I hadnt.She had left when got there.She hadnt left when I got there.Had she left when you got there?Yes,she had.No,she hadnt.学习过去完成时需注意的两个问题：学习过去完成时需注意的两个问题：精选2.如果两个动作紧接着发生，则通常不用过去完成时，如果两个动作紧接着发生，则通常不用过去完成时，用过去时态即可。用过去时态即可。I saw them reading books when I came into the classroom.After I finished my homework,I went out to play.精选