现在完成时与过去完成时课件.ppt

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1、关于现在完成时与过去完成时第1页，此课件共19页哦 The Past Perfect Tense过去完成时态过去完成时态第2页，此课件共19页哦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结果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 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+过去分词过去分词第3页，此课件共19页哦2.某个动作从过去已经开始某个动作从

2、过去已经开始,一直持续到现在一直持续到现在,还有可能持续到将来还有可能持续到将来.动作动作的持续性要通过一段时间来表示的持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

3、状语都表示一段时间.He has been away since last week.He has been away for one week.对划线部分提问都用对划线部分提问都用How long第4页，此课件共19页哦现在完成时：助动词助动词have/has+过去分词过去分词过去完成时：助动词助动词had+过去分词过去分词 构成？构成？第5页，此课件共19页哦我认识他三年了。?I have known him for three years.?I had known him when I was a student.我当学生时，就已经认识他了。had known have known wa

4、s第6页，此课件共19页哦 我已经做完作业了。表示在说话时已经做完。I have finished my home-work.第7页，此课件共19页哦 在六点以前，我就已经完 成作业了。By six oclock,I had finished my homework.表示在过去的某一段时间（six oclock 以前）已经做完作业，与现在无关。第8页，此课件共19页哦 他们已经吃过早饭了。在他们到旅馆之前他们已 经吃过早饭了。They have already had breakfast.They had already had breakfast before they arrived at

5、 the hotel.第9页，此课件共19页哦 我从未看过如此令人兴奋 的比赛 他说他从未看过如此令人兴奋的比赛。I have never seen such an exciting match before!He said that he had never seen such an exciting match before!第10页，此课件共19页哦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第11页，此课件共19页哦结构：结构：助动词助动词 had+p.p.(过

6、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 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

7、 had been there for a long time.第12页，此课件共19页哦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 then,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 te

8、n 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第13页，此课件共19页哦4.和和when,before,after,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 l

9、efthad goneLast night,as soon as I _(finish)my work,I went to sleep.had finished第14页，此课件共19页哦Fill in each blank with the proper verb 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

10、 _(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 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第15页，此课件共

11、19页哦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 gonewould 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 her

12、e,the film _ already _(start).hadstarted第16页，此课件共19页哦Fill in each blank with the proper verb form:A:_ you _(finish)your homework?B:Yes,I have.A:What had you 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?

13、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 _(finish)writing.Have finishedhad watchedare doingam writingDo writewriteswill postgotam answeringwill postfinish第17页，此课件共19页哦1.过去完成时态的肯定式，否定式，疑问式和简短回答：

14、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 before 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：第18页，此课件共19页哦感谢大家观看第19页，此课件共19页哦