現(xiàn)在完成時的構(gòu)成和用法

1、精品資料歡迎下載現(xiàn)在完成時的構(gòu)成和用法I 現(xiàn)在完成時1.概念：過去發(fā)生或已經(jīng)完成的動作對現(xiàn)在造成的影響或結(jié)果，或從過去已經(jīng)開始，持續(xù)到現(xiàn)在的動作或狀態(tài)。2.時間狀語： yet,already,just,never,ever,so far,by now,since+時間點， for+ 時間段， recently, lately, in the past few years, etc.3.基本結(jié)構(gòu)：主語+have/has +p.p（過去分詞）+其他4.否定形式：主語+have/has + not +p.p （過去分詞）+其他5.一般疑問句：have 或 has。6.例句： I've wri

2、tten an article.The countryside has changed a lot in the past few years.II 現(xiàn)在完成時1.現(xiàn)在完成時的構(gòu)成：助動詞have/has + 過去分詞2.現(xiàn)在完成時的主要用法表示從過去某一時刻開始并一直延續(xù)到現(xiàn)在的動作或事情,但動作或事情現(xiàn)在已經(jīng)結(jié)束。Someone has just turned off the light.有人剛把燈關(guān)了。I have already finished my homework.我已經(jīng)完成了家庭作業(yè)。表示從過去某一時刻開始并一直延續(xù)到現(xiàn)在的動作或事情仍在繼續(xù)。,但動作或事情可能I want t

3、o see how much the place changed since I saw it last.我想看看從上次見到那地方以來它發(fā)生了多大變化。I have learnt English for more than ten years.我已經(jīng)學(xué)了10 多年的英語。表示人曾有過或到目前為止從未有過的經(jīng)歷.Have you ever been to the Summer Palace? 你曾去過頤和園嗎?I have never had a car. 我從未有過汽車?，F(xiàn)在完成時還常與句型This is the first time ， It s the first time 連用。This

4、 is the first time he has driven a car.這是他第一次開車?，F(xiàn)在完成時和最高級連用表示到現(xiàn)在為止是最的。It s the most boring film I ve ever seen.這是我看過的最令人厭煩的電影。3. 現(xiàn)在完成時的時間狀語 常與不確定的時間狀語連用，如 :already, never, ever, just, yet, before, up to now,so far, for the last few weeks等 ,表示“到目前為止”所發(fā)生的動作.還可以和包括現(xiàn)在在內(nèi)( 到說話時仍未結(jié)束) 的 ,表示一段時間的狀語連用，如:now,

5、today, this morning (afternoon, evening, week, month,year), these days, since,for a long time 等. since 短語或從句表示過去的動作延續(xù)至今，since 之后的時間為一點。Mr. Smith has worked here since 1984.1984 年以來，史密斯先生一直在這工作。精品資料歡迎下載He s learned about 5,000 English words since he went to college.他上大學(xué)以來大約學(xué)了五千個英語單詞。 for 短語表示動作延續(xù)多長時間

6、，for 的賓語為時間段。We have known each other for twenty years.我們認識有二十年了。I haven t seen her for a long time. 我好久沒有見到她了。 just, lately, recently 是完成時的時間狀語，just now有 a moment ago 之意，是一般過去時的時間狀語。The train has just arrived.火車剛到。Did you see Joan just now? 你剛才看到瓊了嗎？Have you heard from your family lately/recently?你

7、最近收到家人的來信了嗎？ in the past few years 意思是“過去幾年來” ，可作現(xiàn)在完成時的時間狀語；in thepast 意思是“在過去” ，常作一般過去時的時間狀語。Great changes have taken place in my hometown in the past few years.過去幾年來，我的家鄉(xiāng)發(fā)生了很大的變化。Where did you work in the past?你過去在哪里工作？ even since then 與 from then on (after that) 都有“打那以后”之意，前者是完成時的時間狀語，后者常用作一般過去時的

8、時間狀語。She s lived here ever since then. 打那以后，她一直住在這。I didn t hear of Jim from then on/after that.打那以后，我就沒有吉姆的消息。 before 泛指“以前”時，可用于現(xiàn)在完成時中；ago 表示“現(xiàn)在的一段時間以前”，是一般過去時的時間狀語。I ve never been to Japan before.我以前沒去過日本。She went to Japan a year ago. 她一年前去了日本。、 ever 和 never 也是現(xiàn)在完成時常見的時間狀語。前者意思是“曾經(jīng)”，多見于疑問句或否定句中；后

9、者意思是“從來沒有”，表示全部否定。“Have you ever seen the film?” “No. I have never seen it.”“你曾經(jīng)看過這部影片嗎？”“沒有，從來沒看過。 ”Nobody in our class has ever been there. 我們班沒有人去過那。 already 和 yet 常見于現(xiàn)在完成時中，有“已經(jīng)”之意。前者一般用在肯定句中，后者用在疑問句中。 yet 在否定句中有“還”之意?！癏as the bus left yet ”?“汽車開走了嗎?”“Yes. It has already left. ”“是的，已經(jīng)開走了。 ”“No.

10、It hasn t left yet.“不，還沒有開走?！?so far(到目前為止 )， these days(這些天 ) 也是現(xiàn)在完成時常見的時間狀語。So far, no man has travelled farther than the moon.到目前為止，還沒有人到月球以外旅行。What have you done these days? 這些天來，你做了什么事？ now, today, this morning, this year 等有時可以用現(xiàn)在完成時中，以表示到說話時這一時間尚未結(jié)束。I have learned how to swim now.我現(xiàn)在終于學(xué)會了怎樣游泳。

11、精品資料歡迎下載Have you seen Han Meimei this morning?你今天上午看到韓梅梅了嗎？4. 短暫性動詞與時間段的關(guān)系短暫性動詞在肯定句、疑問句中不能與時間段連用，這些動詞是：become, begin,buy, borrow, arrive, come, die, fall, finish, get to know, go, join, leave, marry等。為了表述這種意思，我們常用相應(yīng)的延續(xù)性動詞have， keep（形容詞、位置副詞、介詞短語）”來代替短暫性動詞。等或短語“be+名詞become be,begin have ,borrow keep,

12、buy have,come (go, arrive, get) be here/there/in， leave be away (from ),die be dead, fall asleep (ill) be asleep (ill), finish be over,get to know know, join be in （ be a member of ） , marry be married 等也可以仍用原短暫性動詞，用句型“It is since 從句（從句中用一般過去時）用“一般過去時+ ago”這一結(jié)構(gòu)來表述延續(xù)性的動作或狀態(tài)?！被蛩朦h五年了。He has been in th

13、e Party for five years.He has been a Party member for five years.It is five years since he joined the Party.He joined the Party five years ago.電影開始五分鐘了。The film has been on for five minutes.It is five minutes since the film beganThe film began five minutes ago.但在否定句中，短暫性動詞可以與時間段連用。如： I haven t bough

14、t the bike for a year.我買這輛自行車還不到一年。She hasn t come here for an hour.她來這兒還沒有一個小時。5. have been 與 have gone 的用法比較have been to a place 意思是 “到過， 去過”，表示曾經(jīng)到過某處， 但現(xiàn)在人不在那兒。have gone to 意思是 “去了”，表示已經(jīng)去了某地， 現(xiàn)在人可能在去的途中或已在那兒了。Has she ever been to Nanjing? 她曾去過南京嗎？You have never been there, have you? 你以前從未去過那兒，是嗎？

15、I have been to Guiling ,I went there last year.我去過桂林，我去年去的。She has gone to Nanjing. 她已經(jīng)去南京了?，F(xiàn)在完成時專項練習(xí)一單項選擇。1. Where is Mr. Liu?-He _the library.A. has been toB. has gone toC. has been in精品資料歡迎下載2.The students have cleaned the classroom, _?A. so theyB. don t they C. have theyD. haven t they3.I like H

16、ainan. I _there three times.A. wentB. goC. have beenD. have gone4.We came to Nanjing three years ago, so we _ here for three years.A. have been toB. have been inC. have beenD. have gone5.- How long _you_ your dictionary?- About two months.A. did; buyB. have; getC. have; hadD. have; bought6.He tells

17、me he_ China for over five years.A. has beenB. has been inC. has been toD. has gone to7._has Mr White been a member of Greener China since he _ to China?A. How soon, comes B. How often, got C. How long, came D. How far, arrived 8. His uncle_ for more than 9 years.A. has come here B. has started to w

18、ork C. has lived there D. has left the university二、按要求改寫句子。9.He has never surfed, _( 改成反意疑問句）?10. They have been here since 2000 . ( 對劃線部分提問 )_ have they been here?11. The old man _last year. He_ for a year.(die)12.This factory opened twenty years ago.( 改寫句子，句意不變)This factory _ for twenty years.13.

19、Miss Gao left an hour ago. （改寫句子，句意不變）14. The Green Family moved to France two years ago. （改寫句子，句意不變）_ two years_ the Green family moved to France.15. The bus has arrived here. It arrived ten minutes ago. （改寫句子，句意不變）_.三、動詞填空：1._ you _(clean) the room?Yes, we _(do) that already.When _ you _(do) it?We

20、 _(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?4.I _ (read) the novel twice. It s interesting.5.She _ (go) to Pairs, hasnYes. t she?How _ she _(go) there?She _ (go) there by air.6.So far, many countries _(develop) thei

21、r software programs.精品資料歡迎下載7. Mr Chen _(give)up smoking last year.8. Mr chen _(give) up smoking since last year.四、 1）、選用for 和 since 填空 :1. We haven t 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. It s five years _ we met last time.2）、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