上一页下一页主菜单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构成主菜单上一页下一页have (has）+ 过去分词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 (我已经经完成了家庭作业业,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since + 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,现在完成时的时间状语常与already, never, ever, just, yet, before, up to now, so far, for the last few weeksthese days, since for a long time连用上一页下一页主菜单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, become, begin, begin, buy, buy, borrow, borrow, come (go, arrive), come (go, arrive), die, die, finish, finish, join, join, leave leave, , 等 。上一页下一页为了表述这种意思,我们常用相应的延延 续性动词续性动词 来代替短暂性动词。主菜单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 ten years.The old man has been dead for ten years/since 10 years ago.WW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.I have been away from hometown for 10 years.WWW下一页上一页主菜单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Has she ever been to Nanjing? 她曾去过南京吗？You have never been there, have you? 你以前从未去过那儿，是吗？I have been to Guiling ,I went there last year. 我去过桂林，我去年去的。She has gone to Nanjing. 她已经去南京了。上一页下一页主菜单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但现在完成时注意的 不是事情本身，而是强调事情与现不是事情本身，而是强调事情与现 在保持的某种密切联系（如现在的在保持的某种密切联系（如现在的 结果，影响结果，影响, ,一直延续到现在等）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 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 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 .主菜单上一页主菜单动 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? Havecleanedhave donediddodidHasseendidseesawhavebeen下一页上一页主菜单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.have readhas gonedidgowenthave developedgavehas given下一页上一页主菜单选用 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 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.forsinceforsinceforsince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. 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 inhas gone tohave beenHave beenhas been has gone have been下一页上一页主菜单改 错1. Ho