现在完成时讲解课件材料.ppt

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1、现在完成时,present(now),future,past,do my homework,现在完成时的构成,主菜单,上一页,下一页,have (has）+ 过去分词,Mother: John, clean your teeth please.,John: Mum, I have already(已经) cleaned them.,现在完成时的基本句型：,肯定式：主语 + 助动词have/has + 动词的过去分词. 疑问式：助动词Have/Has + 主语 + 动词的过去分词? 否定式: 主语 + 助动词have/has + not + 动词的过去分词.,例句：,6.Has he gone

2、to the library ? 他是去了图书馆吗？ Yes ,he has. 是的，是去那里了。No, he hasnt. 不，他没去那里。 7.How long has Mrs Smith been in Beijing？Smith夫人来北京多长时间了？,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 you 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

3、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since + 过去的时间点，for + 一段时间，so far 等时间状语连用。,3.表示人曾有过或到目前为止从未有过的经历.,上一

4、页,下一页,I have ever been to the Summer Palace? (我曾去过颐和园),I have never had a car. (我从未有过汽车。),现在完成时的主要用法,主菜单,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,3.表示人曾有过或到目前为止从未有过的经历,现在完成时的运用(1): 1在表示“用法1”时，现在完成时常和副词already, yet, never, ever ,before ,just等连用。,a）already 往往用于肯定句，用在疑问句时表示强 调或加强语气；

5、yet 用于否定句和疑问句。,He has already left here. 他已经离开这里了。 Has he already left here? 他（真的）已经离开这里了吗？（表示加强语气） My teachers havent had breakfast yet. 我的老师们还没有吃早饭。 Have you written to your parents yet? 你已经给你父母写过信了吗？,yet在现在完成时中的用法,否定句:句末 “还(没)”,疑问句: 句末 “己经”,Eg. I havent had breakfast yet. Have you had breakfast y

6、et?,b） never 是否定词，表示“从来没有”，而ever 表示“曾经”,We have never been to the Great Wall. 我们从来没有去过长城。 Have you ever been to Canada? 你们曾经去过加拿大吗？,c） just表示“刚刚”（用于完成时态时，与already，never 等副词的位置一样，多用在助动词have/has和动词过去分词之间）,He has just come back. 他刚刚回来。 They have just finished the work. 他们刚刚完成那项工作。,现在完成时的时间状语,常与already,

7、 never, ever, just, yet, before, up to now, so far, for the last few weeks these days, since for a long time 连用,上一页,下一页,主菜单,1.for +,Eg. I have been here for 5 weeks. Hes studied English for 3 years.,一段时间,2. since +,从句(一般过去时),单词,词组,(表示过去某一时间的)时间点,Eg. I have been here since 2000. I have been here sinc

8、e 5 years ago. I have been here since I graduated in 2000.,since: (自以来) 1)since+时间点 Hehasstayedheresince5oclock. 2)since+ 时间段+ ago Hehasstayedheresince5hoursago. 3)since+ 从句 ShehastaughtEnglishsincehecamehere. for: (长达） for+ 时间段 He has kept the book for 2 weeks.,since , for 的用法:,注1): since 也可单独使用, 表

9、示“自那时起”; 另外since前也可加上ever,以加强语气. Eg. I have been here (ever) since I graduated in 2000.,注2): 对for或since引导的时间状语提问 必须用how long, 决不能用when.,Eg. *I have lived here for 10 years.,How long have you lived here?,*She has stood here since 2 hour ago.,How long has she stood here?,短暂性动词与延续动词间的转换,leav come/go (t

10、o) arrive (at/in) get (to) reach buy borrow finish,be away (from),be (in/at),be (in/at),be (in/at),be (in/at),have,keep,be over,join start/begin die close open return marry become,be in/be a/an,be on,be dead,be closed,be open,be back,be married,be,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连用，这些动词是： become, b

11、egin, buy, borrow, come (go, arrive),die, finish, join, leave等。,上一页,下一页,为了表述这种意思,我们常用相应的延续性动词 来代替短暂性动词。,主菜单,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。 3.他已经回来三天了。 4.自从六点钟他

12、就来这儿了。 5.我离开家乡已十年了。,W,W,下一页,上一页,主菜单,have been 与have gone 的用法比较,1.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。 Eg.Has she ever been to Nanjing? 2.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。 Eg.You have been in Beijing for 2 years. 3.have been in 意思是“呆在某处一段时间了 Eg.She has gone to Nanjing.,与一般过去时的用法比较

13、,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 dictionary. 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 dictiona

14、ry. 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 the film on television yesterday .,但since(自以来)+某一过去时间或叙述过去事情的从句总是与现在完成时连用。,eg： They have known each other since 1950 .,Since he was a child ,he

15、 has lived in England.,主菜单,三常与一般过去时连用的典型的 表示过去时间的状语:,上一页,下一页,yesterday(昨天), the day before yesterday(前天), just now(刚才)， 时间+ ago, last +时间 等;,eg: The plane took off ten minutes ago.,We finished our task last week .,主菜单,It is +一段时间 +since+句子(一般过去时) =一段时间+has passed +since + 句子(过去),Eg. It is five years

16、 since I joined the army. =Five years has passed since I joined the army.,动 词 填 空： 1._ you _(clean) the room? Yes, we _(do) that already. When _ you _(do) it? We _(do) it an hour ago. 2._ he _(see) this film yet? Yes. When _ he _(see) it? He _ it last week. 3. How many times _you_(be) there?,下一页,上一页

17、,主菜单,4. I _ (read) the novel twice. Its interesting. 5. She _(go) to Pairs, hasnt she? Yes. How _ she _(go) there? She _(go) there by air. 6. So far, many countries _(develop) their software programs. 7.Mr Chen _(give)up smoking last year. 8.Mr Chen _(give) up smoking since last year.,下一页,上一页,主菜单,选用

18、 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 minutes. 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.,下一页,上一页,主菜单,用Have

19、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. 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 _ yo

20、u _ ? Li Lei is looking for you.,下一页,上一页,主菜单,改 错 1. How long have you begun to study English? 2. I have borrowed this book for two weeks. 3. The river has become very dirty since last August. 4. Our manager is away today. He has been to Guangzhou on business. 5. He has gone out for two years.,下一页,上一

21、页,主菜单,The house is dirty. We _it for weeks. A didnt clean B hadnt cleaned C dont clean D havent cleaned 2. - Im sorry to keep you waiting.-Oh, not at all. I _here only a few minutes.A have been B had been C was D will be 3. You dont need to describe her. I _ her several times.A. had met B have met C

22、 met D meet 4. -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 will they leave ?-They _very soon .A do leave B are leaving C have left D leave 7.The teacher told the pupils that the earth

23、 _ 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,翻译下列句子：1. 你曾经吃过鱼和薯条吗？2. 我刚刚丢了我的语文书。3. 我以前从来没去过那个公园。4. 他已经吃过午饭了。5. 你已经看过这部电影了吗？6. 我哥哥还没回来。7. 自从1992年他住在这里。8.这本字典我已买了三年了。 9.他离开中国三年了,