八年级现在完成时讲解

1、现在完成时态,语法练习课,时态,不同时间发生的动作，动词要用不同形式,判断下列句子的时态,1.She works in a factory. 2.I was doing my homework at this time yesterday. 3.We are going to have a picnic this Sunday. 4.They held a sports meeting last week. 5.Are you doing your homework ,一般现在时,过去进行时,一般将来时,一般过去时,现在进行时,已学习过的时态,1.v原形 2. v三单,am/is/are+v-

2、ing,1.will/shall+v原形 2.be going to +v原形 3.be+ving 4 be about to + v原形,1.v-ed（规则动词） 2.不规则动词,was/were+v-ing,现在完成时,主菜单,上一页,下一页,现在完成时的构成,现在完成时的主要用法,现在完成时的时间状语,短暂性动词与时间段的关系,have been 与have gone 比较,与一般过去时的用法比较,现在完成时的主要用法,上一页,下一页,Its so dark. -Someone has turned off the light. (有人刚把灯关了,对现在造成的结果是:现在很黑,Are y

3、ou free? -I have finished my homework. I am free (我已经完成了家庭作业,对现在造成的结果是很有空,主菜单,1.表示过去发生的某一动作对现在造成的影响或结果,上一页,下一页,I have learnt English for more than ten years.我已经学了10多年的英语。 (从10年前开始,持续到现在还在学) She has swum since half an hour ago. 我已经游泳了半个小时 (半个小时前已经开始游泳,到现在还在游,现在完成时的主要用法,主菜单,2.表示过去已经开始, 持续到现在的动作或状态.常与s

4、ince + 过去的时间点，for + 一段时间，so far 等时间状语连用,现在完成时的主要用法,1.表示过去发生的某一动作对现在造成的影响或结果,2.表示过去已经开始, 持续到现在的动作或状态,现在完成时,1.过去发生的动作对现在造成的影响或结果,2.过去已经开始，持续到现在的动作或状态,动词构成：have/has+v过去分词,had breakfast,I have just had my breakfast,现在我不饿,Im not hungry now,moved here in 2000,I still live here,I have lived here for three

5、years,I have lived here since 2000/three years ago,now,1.用法,2.现在完成时动词构成: have / has + v 过去分词,助动词,否定,havent hasnt,疑问,Have you? Has he,动词的过去分词形式,1.规则动词 2.不规则动词,finish-finished-finished live-lived-lived carry-carried-carried stopstopped-stopped,eg,gowentgone see-sawseen forgetforgot-forgotten,I, finish

6、, homework,I havent finished my homework,Have you finished your homework? Yes, I have. / No, I havent,I have finished my homework,1. 她成为一名护士已经三年了。 2. 我五年前就认识李雷了。 3. 那些相片我已经寄给他了。（post） 4. 我来到这个学校后，他就一直教我。 5. 我刚丢了我的历史书,She has been a nurse for three years,I have known Lilei since five years ago,I have

7、 already posted the photos to him,He has taught me since I came to the school,I have just lost my history book,1).for+表示一段时间的短语 ( 2).since+表示过去时间点的词语 ( 3).since+表示过去时间的时间状语从句,eg.I have been a teacher _ a year. He has been at this school _ 1992. We have learned 1,000 English words _ we came to this s

8、chool,for,since,since,B. 常与 just, already, yet, ever, never，so far 连用, 强调动作完成,不强调动作的持续,eg.Have you _been to Japan? I have _ finished my homework. I have finished my homework _. I havent finished my homework _,ever,just,already,yet,A.for+时间段/ since +时间点,3. 现在完成时的时间状语,短暂性动词与时间段的关系,短暂性动词在肯定句、疑问句中不能与时间段

9、连用，这些动词是：become, begin, buy, borrow, come (go, arrive), die, finish, join, leave, 等,上一页,下一页,在完成式中表述这种意思,我们常用相应的延续性动词 来代替短暂性动词,主菜单,四,become be, begin have , borrow keep, buy have, come (go, arrive, get) be here/there/in， die be dead, finish be over, join be in （be a member of ） leave be away ( from,下

10、一页,上一页,主菜单,但在否定句中，短暂性动词可以与时间段连用。 如：I havent bought the bike for a year. 我买这辆自行车还不到一年。 She hasnt come here for an hour. 她来这儿还没有一个小时,上一页,下一页,主菜单,翻 译 练 习： 1.我买了这块手表五年了。 2.这位老人已经死了十年了,I have bought this watch for five years. I have had this watch for five years/since 5 years ago,The old man has died for

11、 ten years. The old man has been dead for ten years/since 10 years ago,W,W,下一页,上一页,主菜单,3.他已经回来三天了。 4.自从六点钟他就来这儿了。 5.我离开家乡已十年了,He has come back for 3 days. He has been back for 3 days/since 3 days ago,He has come here since 6 oclock. He has been here since 6 oclock,I have left hometown for 10 years.

12、I have been away from hometown for 10 years,W,W,W,下一页,上一页,主菜单,五.have been 与have gone 的用法比较,have been to 意思是“到过，去过”，表示曾经到过某处，但现在人不在那儿。 have gone to 意思是“去了”，表示已经去了某地，现在人可能在去的途中或已在那儿了。 have been in 意思是“呆在某处一段时间了,上一页,下一页,主菜单,1. Has she ever been to Nanjing? 她曾去过南京吗？ 2.You have never been there, have you

13、? 你以前从未去过那儿，是吗？ 3.I have been to Guiling ,I went there last year. 我去过桂林，我去年去的。 4.She has gone to Nanjing. 她已经去南京了,上一页,下一页,主菜单,六.与一般过去时的用法比较,一.现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身，而是强调事情与现在保持的某种密切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只讲述发生在过去的动作和事情与现在没有关系,上一页,下一页,主菜单,eg：He has bought an English-Chinese dicti

14、onary. 他已经买了一本英汉字典。 He bought an English-Chinese dictionary. 他曾买过一本英汉字典,上一页,下一页,第一句用现在完成时时态，想表达意为：“He bought an English-Chinese dictionary. And he still has it” “过去他买了一本英汉字典，现在他还有这本字典”,第二句用过去时只叙述过去他买过一本英汉字典这一事实，至于现在他是否有这本字典并未强 调说明,主菜单,二时间状语的区别： 当有一个表示过去某一特定时间的状语时，不用现在完成时，而用一般过去时,上一页,下一页,eg: I saw th

15、e film on television yesterday,现在完成时现在完成时总是与since+时间点，for +时间段连用,eg： They have known each other since 1950,Since he was a child ,he has lived in England,主菜单,选用 for和 since填空: 1.We havent seen each other _ a long time. 2.His father has been in the Party _ 10 years ago. 3.The film has been on _ 20 minu

16、tes. 4.Mr Green has worked here _ he came to China. 5.His grandparents have been dead _ several years. 6. Its five years _ we met last time,for,since,for,since,for,since,下一页,上一页,主菜单,用Have been to, have gone to, have been in 填空,Mike and his parents _ the north for half a year. Mum is not at home now.

17、 she _ the shop. _ you ever _ to kunming ? Never. Where _ you _ these days? Has Jim arrived yet? Yes, he _ here for several days. Where is Peter? I dont know where he _. Hi Jim! Where _ you _ ? Li Lei is looking for you,have been in,has gone to,have been,Have been,has been,has gone,have been,下一页,上一页

18、,主菜单,The house is dirty. We _it for weeks. A didnt clean B hadnt cleaned C dont clean D havent cleaned 2. -_the sports meeting might be put off.-Yes, it all depends on the weather.A Ive been told B Ive told C Im told D I told 3. - Im sorry to keep you waiting.-Oh, not at all. I _here only a few minu

19、tes.A have been B had been C was D will be 4. You dont need to describe her. I _ her several times.A. had met B have met C met D meet 5. -Will you go to Beijing for vacation ?-I _ to go , but I dont know if I can go . A was planning B have planned C had been planning D have been planning,6. -When wi

20、ll they leave ?-They _very soon .A do leave B are leaving C have left D leave 7 -Was he studying for an exam ? -Yes , hes _ it last week.A doing B to take C making D to give8.The teacher told the pupils that the earth _ round. A is B would C was D were 9. She _ such an interesting book before.A was never reading B will never read C had never read D has never read 10.How long do you think the meeting _ A is lasting B is lasted C will last D lasts,改 错 1. How long have you begun to study English? 2. I have borrowed this book for two weeks. 3. The river has bec