Unit3现在完成时

1、Unit3: Grammar 现在完成时现在完成时现在完成时 现在完成时的构成现在完成时的构成现在完成时的主要用法现在完成时的主要用法现在完成时的时间状语现在完成时的时间状语春天还会远吗 ? can spring be far behind?冬天来了,Winter has come, Mother: John, clean your teeth please. John: Mum, I them. 现在完成时的构成现在完成时的构成have /has + + 过去分词过去分词 肯定式：肯定式：主语 + have/has + done. 疑问式：疑问式：Have/Has + 主语+ done?否定

2、式否定式: 主语 + have/has + not +done.present(now)futurepast 现在完成时现在完成时( present perfect tense)do my homework 1.He has cleaned his room. (变一般疑问句）Has he cleaned his room?2. They have come back from work. (写否定句）They havent come back from work.4. He has been to China, _ _? （写出反义疑问句部分）hasnt he 3. She has live

3、d in London for four years. (划线部分提问）How long has she lived in London?eg.Has he gone 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。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现在完成时的主要用法- 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

4、)- Are you free?-I have finished my homework. I am free(我已经完成了家庭作业,对现在造成的结果是很有空)1. 1.表示过去发生的某一动作对现在造成的影响或结果表示过去发生的某一动作对现在造成的影响或结果。 (a) already 往往用于肯定句，用在疑问句时表示往往用于肯定句，用在疑问句时表示强强 调或加强语气；调或加强语气；yet 用于否定句和疑问句用于否定句和疑问句 He has already left here. Has he already left here? My teachers havent had breakfast

5、yet. Have you written to your parents yet? (b) just表示表示“刚刚刚刚” 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。2. 2.表示表示过去过去已经开始已经开始, , 持续到持续到现在的动作或状态现在的动作或状态, , 常与“for 段时间或“since点时间”I have known him for ten years.I have learned English since 6 years ago. Mr Wang has worked

6、 in the factory since he came to the city.3.3.表示人曾有过或到目前为止从未有过的表示人曾有过或到目前为止从未有过的经历经历, ,常与常与never，ever连用。连用。I have ever been to the Summer Palace? I have never had a car. 。We have never been to the Great Wall. Have you ever been to Canada? 现在完成时的现在完成时的时间状语时间状语常与常与already, already, never, never, ever,

7、 ever, just, just, yet, yet, before, before, up to now, up to now, so far, so far, for the last few weeksfor the last few weeks these days, these days, since since for a long timefor a long time 连用连用since: (自自以来以来)1)since+时间点时间点He has stayed here since 5 oclock.2)since+ 时间段时间段+ agoHe has stayed here

8、 since 5 hours ago.3)since+ 从句从句She has taught English since he came here. for: (长达）长达）for+ 时间段时间段He has kept the book for 2 weeks.since , for 的用法的用法: Take notes 动动 词词 填填 空：空： 1._ you _(clean) the room?1._ you _(clean) the room?2._ he _(see) this film 2._ he _(see) this film yetyet? Yes.? Yes.3. How

9、 many times _you_(be) there? 3. How many times _you_(be) there? HaveHavecleanedcleaneddiddiddodo4. I _ (read) the novel twice. It4. I _ (read) the novel twice. Its interesting.s interesting.5. She _(go) to Pairs, hasn5. She _(go) to Pairs, hasnt she? Yes.t she? Yes. How _ she _(go) there? How _ she

10、_(go) there? She _(go) there by air. She _(go) there by air.6. 6. So farSo far, many countries _(develop) , many countries _(develop) their software programs. their software programs.have readhave readhas gonehas gonediddidgogowentwenthave developedhave developed选用选用 forfor和和 sincesince填空填空: :1.We h

11、aven1.We havent seen each other _ a long time.t seen each other _ a long time.2.His father has been in the Party _ 10 years 2.His father has been in the Party _ 10 years ago.ago.3.The film has been on _ 20 minutes.3.The film has been on _ 20 minutes.4.Mr Green has worked here _ he came to 4.Mr Green

12、 has worked here _ he came to China.China.5.His grandparents have been dead _ several 5.His grandparents have been dead _ several years.years.6. It6. Its five years _ we met last time.s five years _ we met last time.forforsincesinceforforsincesinceforforsincesince用用Have been to, have gone to, have b

13、een in 填空填空Mike and his parents _ the north Mike and his parents _ the north for half a year.for half a year.Mum is not at home now. she _ the Mum is not at home now. she _ the shop.shop._ you ever _ to kunming ? Never._ you ever _ to kunming ? Never.Where _ you _ these days?Where _ you _ these days

14、?Has Jim arrived yet?Has Jim arrived yet? Yes, he _ here for several days. Yes, he _ here for several days.Where is Peter? I dont know where he Where is Peter? I dont know where he _._.Hi Jim! Where _ you _ ? Li Lei Hi Jim! Where _ you _ ? Li Lei is looking for you. is looking for you.have been inha

15、s gone tohave beenHave beenhas been has gonehave been 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

16、 waiting. -Oh, not at all. I _here only a few minutes. 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 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 teac