初中英語知識點：現(xiàn)在完成時的用法

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1、1 概念引入 如何學(xué)習(xí)時態(tài)？對中學(xué)生來說，最好還是從各個時態(tài)的基本概念、基本形式和基本用法學(xué)起。在過了這一階段之后，再放開步伐，通過大量的聽、讀和筆頭實踐，獲得感性的知識?，F(xiàn)在，我們就從最基本的概念、形式和用法等方面來總結(jié)一種新的時態(tài)——現(xiàn)在完成時。 2 用法講解 一、現(xiàn)在完成時的定義 現(xiàn)在完成時表示過去發(fā)生或已經(jīng)完成的某一動作對現(xiàn)在造成的影響或結(jié)果。 二、現(xiàn)在完成時的構(gòu)成 1.?肯定句 現(xiàn)在完成時的肯定句式是“have（has）＋過去分詞”。 注意：該句式中的have或has是助動詞，has用于第三人稱單數(shù)，其它人稱一律用have。 2. 否定句： 現(xiàn)在完成時

2、的否定句式是“haven’t（hasn’t）＋過去分詞”。 3. 疑問句： 現(xiàn)在完成時的一般疑問句式是把助動詞have或has提到主語之前?；卮鹩肶es, …h(huán)ave(has)./ No, …h(huán)aven’t(hasn’t). 三、?動詞過去分詞規(guī)則變化與不規(guī)則變化 (一)?規(guī)則變化 變化規(guī)則：與動詞過去式規(guī)則相同。 ??? 1. 一般直接在詞尾加上ed。look — looked ??? 2. 以e結(jié)尾的動詞，直接加d。move — moved ??? 3. 以y結(jié)尾，y前面是輔音字母的動詞，變y 為i，再加ed。carry — carried ??? 4. 部分動詞

3、需雙寫尾字母，加ed。stop — stopped ?(二)不規(guī)則變化 ??不規(guī)則動詞的變化因詞而異。但是如果對不規(guī)則動詞的過去式和過去分詞做一分析，就可發(fā)現(xiàn)其中的“規(guī)則”。同學(xué)們在記憶時，可按下面的形式對教材后不規(guī)則動詞表進行分析、整理。例如： 　AAB型 原形 過去式 過去分詞 中文 beat beat beaten 打敗 　　??????????????? ????????????ABC?型 原形 過去式 過去分詞 中文 be was / were been 是，在… begin began begun 開始 blow blew bl

4、own 吹 break broke broken 破裂、折斷 AAA型 原形 過去式 過去分詞 中文 cost cost cost 花費 cut cut cut 砍、切、割 hit hit hit 打、撞 ABA型 原形 過去式 過去分詞 中文 become became become 成為 come came come 來 ABB型 原形 過去式 過去分詞 中文 understand understood understood 理解、明白 bring brought brought 帶來 bui

5、ld built built 建造 burn burned/burnt burned/burnt 燃燒 四、現(xiàn)在完成時的用法 現(xiàn)在完成時表示過去某時發(fā)生的行為對主語目前產(chǎn)生的影響。即用過去發(fā)生的某個行為來說明現(xiàn)在的某種情況。例如： ??? We are good friends. (現(xiàn)在的情況）我們是好朋友。 ??? I knew him in 1997. (過去的動作)?我1997年認識了他。 ??? We have known each other since 1997. 我們自從1997年相互認識。 （現(xiàn)在完成時把過去的動作和現(xiàn)在聯(lián)系起來并著眼于現(xiàn)在） (

6、1)?表示動作發(fā)生在過去某個不確定的時間，但對現(xiàn)在留下了某種影響和結(jié)果。常被just、already、yet 等副詞修飾。例如： ????— Have you had lunch yet? 你（已經(jīng)）吃午飯了嗎？ ????— Yes, I have. I’ve just had it. 是的，吃過了。我剛剛吃過。（現(xiàn)在我不餓了） (2)?表示從過去某一時刻開始一直持續(xù)到現(xiàn)在的動作或狀態(tài)。這個動作可能剛停止，可能仍然在進行。常帶有for和since等表示一段時間的狀語。例如： ??? He has taught here since 1981. 他自1981年就在這兒教書。（可能還要繼續(xù)

7、教） ??? I haven’t seen her for four years. 我有四年沒見到她了。 (3)?表示說話前發(fā)生過一次或多次的動作，現(xiàn)在成為一種經(jīng)驗，一般譯為漢語“過”，常帶有twice, ever, never, three times等時間狀語。例如：　 ??? I have been to Beijing twice.我去過北京兩次。 五、現(xiàn)在完成時常用的時間狀語 before, by now (so far), once, twice…, just, recently, yet(否/疑), already(肯), ever, never, all one’

8、s life , in /during the past /last 5 years ???例如： ??? We have already finished our homework. 我們已完成作業(yè)了。 ??? They haven’t finished their homework yet. 他們還沒有完成作業(yè)。 ????— Have you ever been to the Great Wall? 你曾經(jīng)去過長城嗎？ ????— I have never been to the Great Wall.我從未去過長城。 ????I have seen her before, bu

9、t I can not remember where. ????我以前見過她，但記不起在哪里見過。 ????He has been there three times the last few days. ????近幾天他去過那里三次了。 六、現(xiàn)在完成時與一般過去時的比較 1)?一般過去時表示過去某時發(fā)生的動作或單純敘述過去的事情，強調(diào)動作；現(xiàn)在完成時為過去發(fā)生的，強調(diào)過去的事情對現(xiàn)在的影響，強調(diào)的是影響。 ??? I saw this film yesterday. 我昨天看了這部電影。（強調(diào)看的動作發(fā)生過了。） ??? I have seen this film. 我看過

10、這部電影了。（強調(diào)對現(xiàn)在的影響，電影的內(nèi)容已經(jīng)知道了。） 2)?一般過去時常與具體的表示過去的時間狀語連用；現(xiàn)在完成時通常與模糊的時間狀語連用，或無時間狀語。 一般過去時的時間狀語：? yesterday；last week；…ago；in1990；in October；just now … 現(xiàn)在完成時的時間狀語：? already；ever；? for；just；never；since；yet；so far；till/until； ?up to now；in the past few years；recently… 3)?現(xiàn)在完成時可表示持續(xù)到現(xiàn)在的動作或狀態(tài)，動詞一般是延

11、續(xù)性的，如： live；teach；learn；work；study；know等； 一般過去時常用的非持續(xù)性動詞有come, go, leave, start, die, finish, become等。 ????She joined the League three years ago.? ????她三年前入團了。?(加入的動作不是延續(xù)的) ????She has been in the League for three years (since three years ago). ????她入團三年了。(在團內(nèi)的狀態(tài)，可延續(xù)) ????She has been a Leagu

12、e member for three years (since three years ago). ????她入團三年了。(是團員的狀態(tài)，可持續(xù)) 七、非延續(xù)性動詞和延續(xù)性動詞的轉(zhuǎn)換　　 現(xiàn)在完成時可以和帶有since或for等表示一段時間的狀語連用，表示動作或狀態(tài)從某一時刻開始，一直持續(xù)到現(xiàn)在。但是，像come, arrive, buy等終止性動詞不能與表示一段時間的狀語連用。要用，必須將其改為相應(yīng)的延續(xù)性動詞來表述。現(xiàn)歸納總結(jié)一下由非延續(xù)性動詞到延續(xù)性動詞的轉(zhuǎn)換： ????arrive → be here　　　　　　　　?????? ????begin(start) → be

13、 on? ????die →be dead　　　　　　　　??????????? ????come back → be back ????leave →be away　　　　　　　　??????? ????fall ill(sick, asleep)→be?ill(sick, asleep) ????get up→be up　　　　　　　　　??????? ????go out→be out ????finish →be over　　　　　　　　????????????????? ????put on→wear?或be on ????open→be open　　　　　　　　?

14、????????? ????join→be in或?be a member of… ????close→be closed　　　　　　?????????????? ????go to school → be a student ????borrow→keep　　　　　　　 　????????? ????buy→have　　　　　? ????catch(a cold)→ have(a cold)　???????????????? ????get to know →know ????begin to study→study　　　　　?????????? ????come to w

15、ork→work 例如： ??? He has been a soldier for three years. 他參軍三年了。 ??? His father has been dead for two years. 他父親去世兩年了。 ??? The film has been on for ten minutes. 電影已開始十分鐘了。 ??? We have studied English for three years. 我們（開始）學(xué)英語已三年了。 八、have/has gone to；have/has been to；have/has been in的區(qū)別 ???

16、have/has gone to：已經(jīng)去了或在途中，還沒有返回； ??? have/has been to：曾經(jīng)去過某地，現(xiàn)在已經(jīng)回來了，后面可接表示“次數(shù)”的狀語； ??? have/has been in：表示某人“已在某地停留一段時間，現(xiàn)仍在那里”，其后常帶表示一段時間的狀語。?例如： ????— Where is Tom? Tom 在哪兒？ ????—?He has gone to the bookshop to buy some books.? ????他去書店買書了。 ????I have been in Beijing for 5 years.? ????我在北京待

17、了5年了。 ????Jack has been to Shanghai twice. Jack? ????去過上海兩次了。 鞏固練習(xí) 　一、單項填空。 1. Li Hong has ________ the army for 2 years. ????A. joined　　　? ????B. be in　　　? ????C. been in 　　　 ????D. joined in 2. We have been friends since ______. ????A. children　　　? ????B. five years　　　? ????C. five

18、years ago 　　　 ????D. five years before 3. Mike ___________ the story for a month. ????A. has bought 　　　 ????B. has had 　　　 ????C. had had　　　? ????D. has borrowed 4. You ______ that question three times. ????A. already asked　　　　　　 ????B. have already asked ????C. already have asked 　　　 ???

19、?D. asked already 5. Those foreign friends left Guangzhou __________. ????A. since last week　　? ????B. a week ago 　　 ????C. for a week　　? ????D. since a week ago 6. I _____ at this school for two years. ????A. am studying 　　　 ????B. study 　　　 ????C. studied 　　　 ????D. have studied 7. They

20、 _________ in the city since last summer. ????A. live 　　　 ????B. didn’t live　　　? ????C. have lived　　　　? ????D. live 8. Mrs. Wang has lived in Haikou _____ 1992. ????A. since　　　? ????B. from 　　　 ????C. after 　　　　 ????D. in 9. Mr. Black _________Chinasince the summer of 1998. ????A. has bee

21、n to 　　　 ????B. has been in　　　? ????C. has come to 　　　　 ????D. came to 10. His father _______ for years. ????A. has died 　　? ????B. has been dead　　　? ????C. died D. dies [真題鏈接] 1. — Beibei, is Mr. Chen in the office? ????— No. He ??????for half an hour. ????A. left?? ????B. has left?????

22、?? ???????????????? ????C. has been away 2. — Is Miss Green in the office??? — No, she ____ to the library. ????A. goes ?????????????? ????B. had goes?????????????? ????C. has gone?????????????? ????D. would go 3. — A new shop ______ for a week nearby. Let’s have a look there. ????— Good id

23、ea. But it doesn’t ____ on Mondays. ????A. opened; opened? ???????? ????B. has been opened; open ????C. has opened; opened???????? ????D. has been open; open 二、用 already或 yet填空。 1. Have they taken down the old pictures ____? No, not _______. 2. Most of us have finished our compositions ______

24、__ 3. He said he hadn’t visited the exhibition ________. 三、用 since或 for填空。 1. We have learned five lessons ______ the beginning of this term. 2. Mrs. Liao has been in hospital ______last week. 3.? I have stayed at my aunt’s _____two weeks. 四、用have/has been to/in, have gone to及go的各種形式填空。 1. —

25、Where is Jack? — He __________ his country.?????? 2. John __________Englandsince he came back. 3. How long __________ you __________this village????????? 4. The Smiths __________ Beijing for years. 5.? — __________you ever __________ America? — Yes, I __________ there many times.? 6.? I _____

26、_____this school since three years ago. 7.? — When __________ he __________? — He __________ an hour ago. 8. — Would you like to __________ the zoo with me? — Yes, but I __________there before. 9. — Where __________ you __________ just now? — I __________ the zoo. 10. He often__________ swimm

27、ing.??? 11. __________ you __________ there last year? 12. __________ they often __________skating in winter?????????????? 五、句型轉(zhuǎn)換，每空一詞。 1. He has already gone home.?? He _______ _______ home _________. (否定句) ________ he ________ home _________? (一般疑問句) 2. He has lunch at home.?????? He _____

28、___ _________ lunch at home. (否定句) ________ he _______ lunch at home? (一般疑問句) 3. He has been there twice. (對劃線部分提問)? ________ ______ _______ ________ he been there? 4. I have lunch at school.? (對劃線部分提問)????? ________ ________ you _________ lunch. 5. They have been here since 2000.??? ________

29、 ________ have they been here? (對劃線部分提問)????? 6. This factory opened twenty years ago.(改為同義句) This factory________ ________ ________? for twenty years. 7. Miss Gao left an hour ago.? (改為同義句) ?Miss Gao _______ _______ _______ _______ an hour ago. 8. Her mother has been a Party member for three y

30、ears. (改為同義句) Her mother ______ the? Party? three? years _______ . 9. The Green Family moved toFrancetwo years ago. (改為同義句) ? _______ two years ________ the Green family moved toFrance. 10. The bus has arrived here. It arrived ten minutes ago. (把兩個句子合并成一個句子)?? ?_______________________________??

31、 參考答案 一、單項填空。 1. C?，F(xiàn)在完成時在肯定句中，與since或for引出的時間狀語連用的是延續(xù)性動詞，不能是短暫性動詞。在此題中join是短暫性動詞，不能與for+時間段連用，須把它改成相應(yīng)的延續(xù)性動詞。此題join要改成be in。這兩種詞的轉(zhuǎn)換是學(xué)習(xí)現(xiàn)在完成時需要注意的。 2. C?，F(xiàn)在完成時表示過去已經(jīng)開始，一直持續(xù)到現(xiàn)在的動作或狀態(tài)。它的時間狀語since +?表過去的時間點，for +?時間段連用。 3. B。在肯定句中，與since或for引出的時間狀語連用的是延續(xù)性動詞，不能是短暫性動詞，在此題中buy是短暫性動詞，不能與for +?時間段連用，

32、須把它改成相應(yīng)的延續(xù)性動詞。此題 buy 要改成 has had。 4. B?，F(xiàn)在完成時表示過去發(fā)生或已經(jīng)完成的動作或存在的狀態(tài)對現(xiàn)在造成的影響或結(jié)果；already 應(yīng)放在have后面。 5. B。該題考查一般過去時。? 6. D?，F(xiàn)在完成時表示過去已經(jīng)開始，一直持續(xù)到現(xiàn)在的動作或狀態(tài)。與for +?時間段連用。 7. C。since是現(xiàn)在完成時的標志詞。 8. A。本句為完成時態(tài)，此處應(yīng)該選擇since；?“since +?表過去的時間點”是完成時態(tài)的標志性時間狀語。 9. B。與since或for引出的時間狀語連用的是延續(xù)性動詞，不能是短暫性動詞，come是短暫性動詞因此選B

33、。 10. B?，F(xiàn)在完成時與since或for引出的時間狀語連用的是延續(xù)性動詞，不能是短暫性動詞，die是短暫性動詞,因此要用be dead來代替。 [真題鏈接] 1. C。句意：—貝貝，陳先生在辦公室嗎？—沒有，他出去一個小時了。因為題中說道“他出去一個小時了”，所以到應(yīng)該用延續(xù)性動詞，故選C。 2. C。句意：—格林老師在辦公室嗎？—不在，她去圖書館了。本題考查動詞的時態(tài)。由語境可知她去圖書館了，現(xiàn)在還沒回來，故選C項。 3. D。本題意為：—這附近有一家新開了一周的店，我們?nèi)タ匆幌掳?。—好主意，但是周一不開門。本題第一空應(yīng)該用延續(xù)性動詞，第二空在助動詞后面，應(yīng)該用動詞原形。故選

34、D。 二、用 already或 yet填空。 1. yet; yet?? 2. already? 3. yet 三、用 since或 for填空。 1. since? 2. since? 3. for 四、用have/has been to/in, have gone to及go的各種形式填空。 1. has gone to? 2. has been in? 3. have; been in? 4. have been in?? 5. Have; been to; have been 6. have been in? 7. did; go; went? 8. go; have b

35、een?? 9. did; go; went to?? 10. goes 11. Did; go?? 12. Do; go 五、句型轉(zhuǎn)換，每空一詞。 1. hasn’t gone; yet; Has; gone; yet???? 2. doesn’t have; Does; have??? 3. How many times has 4. Where do; have?? 5. How long?? 6. has been open?? 7. has been away since 8. joined; ago??? 9. It’s; since??? 10. The bus has been here for ten minutes.