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1、Ive had this bike for three years.Unit 10现在完成时的构成主菜单上一页下一页have (has）+ 过去分词present(now)futurepast现在完成时 ( present perfect tense)do my homework 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
2、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。since +(过去的)时间点I have
3、been here since 2000.He has worked as a lawyer since 5 years ago?Theyve lived in CQ since they married in 2000.注1)：since 也可单独使用, 表示“ 自那时起”；另外since前也可加上 ever，以加强语气。 I have been here (ever) since then.3.表示人曾有过或到目前为止从 未有过的经历.上一页下一页I have ever been to the Summer Palace? (我曾去过颐和园)I have never had a car.(
4、我从未有过汽车。)现在完成时的主要用法现在完成时的主要用法主菜单1. 规则动词：与过去时变化相同。(1) 一般+-ed work-worked-worked(2) 以“ e ”结尾, + - d 。 live-lived -lived(3) “辅音字母 + y” 结尾，y 变 i, + -ed。 cry-cried-cried(4) 重读闭音节结尾(辅元辅)，双写后+-ed 。 drop-dropped-dropped 2 、不规则动词，见不规则表（p120）动词过去分词 (pp)变化规则have/has gone to:已经去了或在途中，还没有 返回；(去了未回来) have/has bee
5、n to:曾今去过某地，现在已经回 来了，后面可接表示“次数”的状语； (去了已回来) have/has been in:表示某人“已在某地停留 了一段时间，现仍在那里”，其后常带 表示一段时间的状语。 (状态)(曾经在，现在还在那里) 现在完成时和一般过去时的区别：现在完成时和一般过去时的区别： 现在完成时: 强调这一动作产生的结果对现 在的影响或结果，与现在有关。 一般过去时: 仅表示在过去某一时刻曾发生 过这一动作，与现在无关。 他已学英语五年了。 He has studied English for five years. 他曾学过五年英语。 He studied English fo
6、r five years. （说明他还会继续学下去） （只说明他过去学过五年英语，但现在不学了。） Ive lived here for ten years. 我在这里住了10 年。(现在仍住这儿) I lived here for ten years. 我在这里住过10年。 (现在不住这儿了) He has bought a house. 他买了一栋房子。(现 在已拥有这房子) He bought a house ten years ago. 他10年前买 了一栋房子。(现在是否仍拥有这房子不清楚)一般过去时与现在完成时有一些明 显的时间状语。 遇到yesterday, Last year,
7、 in May, in+过去 某一年，two days ago, the other day, just now等就用一般过去时 (表过去的 时间) 当有 so far, in/during/over the past/ last few days(在过去/最近的几年里)， since接过去时间状语或过去时的句子 等常用现在完成时 (不能与确定的时间 )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) thi
8、s 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 cou
9、ntries _(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
10、 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 1.Mike and his parents _ the north for half a year. 2.Mum
11、is not at home now. she _ the shop. 3._ you ever _ to kunming ? Never. 4.Where _ you _ these days? 5.Has Jim arrived yet?Yes, he _ here for several days. 6.Where is Peter? I dont know where he _. 7.Hi Jim! Where _ you _ ? Li Lei is looking for you.have been inhas gone tohave beenHave beenhas been ha
12、s gone have been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.studiedkeptbeengonebeen下一页上一页主
13、菜单1.The house is dirty. We _it for weeks. A didnt clean B hadnt cleaned C dont clean D havent cleaned2. -_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 told3. - Im sorry to keep you waiting. -Oh, not at all. I _here only a few minu
14、tes. A have been B had been C was D will be4. You dont need to describe her. I _ her several times. A. had met B have met C met D meet5. -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 -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 were9. She _ such an interesting
