现在完成时讲解与练习答案

一、时态讲解：现在完成时 （ 1 ）构成：现在完成时由助动词 have + 过去分词构成，助动词 have 有人称和数的变化。第三人称单数用 has ，其余用 have. 现在完成时的否定式直接在助动词后面加上 not 、疑问式是把助动词提到主语之前。以 study 为例，其否定式、疑问式和简单回答形式如下：

否定式 疑问式 I have not (haven’t) studied…. Have I studied…? You have not (haven’t) studied…. Have you studied… ? He has not (hasn’t) studied…. Has he studied…?

否定疑问式 简单回答（肯定 / 否定Have I not (Haven’t I) studied…? Yes, you have. No, you haveHave you not (Haven’t you) studied…? Yes, I have. No, I haven’Has he not (Hasn’t he) studied…? Yes, he has. No, he hasn’（ 2 ）用法： 1 ） 现在完成时 通常表示在 说话之前已经完成的动作 或存在的状态。说话人强调的是该动作或状态对现在的 结果或影响 。 My daughter has just gone out. 我女儿刚出去。 I’m sure we’ve met before. 我肯定我们以前见过面。 She has arrived. 她到了。 2 ）表示持续到现在的动作或状态，往往和包括现在在内的表示一段时间的状语连用，如 recently, already, just, lately, fo r…, since…, yet 等。如： I haven’t heard from her these days. 这些日子我没有收到她的信。 We haven’t seen you recently. 最近我们没有见到你。 They have been away for two years. 他们离开已经两年了。 She has been with us since Monday. ★ 注意： a) since 和 for 的区别 since 后接时间点，如 1993 ， last term, yes terday, the time I got there for 后接一段时间，表示 “ 长达多久 ” ，如 ten years, a while, two days 等。 Ex ercise : 用 since 和 for 填空 1. Jim has been in Ireland ______ Monday. 2. Jill has been in Ireland ______ three days. 3. His aunt has lived in Australia ______15 days. 4. Mary is in her office. She has been there ______ 7 o'clock. 5. India has been an independent country ______1974. 6. The bus is late. They've been waiting ______ 20 minutes. 7. Nobody lives in those houses. They have been empty ______ many years. 8. Mike has been ill ______a long time. He has been in hospital ______ October. 1. since 2. for 3. for 4. since 5. since 6. for 7. for 8. since 2 ）表示短暂意义的动词如 arrive, leave, borrow, buy, begin, start, die 等，在完成时当中不能和表示一段时间的状语连用，因为它们表示的动作不可能持续。因此，不能说： He has come here for 2 weeks. × The old man has died for 4 months. × They have left only for 5 minutes. × 以上三句话可以改为： He has been here for 2 weeks. The old man has ______ _______ for 4 months. They have _____ _____ only for 5 minutes 2 ） have (has) been 和 have (has) gone 的区别：表示 “ 曾到过某地 ” 要用 “have (has) been”; 表示 “ 已经去某地 ” 要用 “have (has) gone” 。试比较： Where has he been? 他刚才到哪里去了？（已经回来了） Where has he gone? 他上哪儿去了？（人不在） They have been to Canada . 他们到过加拿大。（现在已经不在加拿大） They have gone to Canada . 他们到加拿大去了。（可能在路上和已经到加拿大） . 3 ）现在完成时不能和表示过去的时间状语连用，如 yesterday, last year, in 1976, two days ago, just now, when I came in ，但可以和 already, yet, sometimes, always, often, before, lately, recently, once, twice, ever, never 等连用。例如： She has already come. 她已经来了。 I haven’t read it yet. 我还没读过这个。 I have met him before. 我从前曾见过他。 Ma Hong has always been a good student. 马红一直是个好学生。 I have often seen him in the street. 我经常在街上看见他。 They have never been to Yan’an. 他们从未去过延安。 I haven't seen him lately. 我近来没看到他。

Irregular Verbs Base Form Past Form Past Participle bear bore born beat beat beaten become became become blow blew blown bring brought brought build built built buy bought bought catch caught caught choose chose chosen come came come do did done drink drank drunk drive drove driven eat ate eaten fall fell fallen find found found fly flew flown get got got give gave given go went gone grow grew grown have had had hear heard heard keep kept kept leave left left lose lost lost make made made put put put read read read run ran run say said said see saw seen sell sold sold send sent sent sing sang sung sink s ank/ sunk sunk take took taken teach taught taught write wrote wrote am, is was been are were been

Exercise: I. Fill in the blanks with the proper form. 1. I____ already ____ (see) the film. I ________ (see) it last week. 2. _____ he ____ (finish) his work today? Not yet. 3. My father ____ just ____ (come) back from work. He is tired now. 4. Where’s Li Ming ? He __________ (go) to the teacher’s office. 5. I __________ (work) here since I ______ (move) here in 1999. 6. So far I _______________(make) quite a few friends here. 7. How long ________ the Wangs ______________(stay) here ? For two weeks. 8. I ________ just ___________ (finish) my homework. 9. He ________ (go) to school on foot every day. 10.____ you ______ (find) your science book yet? 11. If it ____ (be) fine tomorrow, I'll go with you. 12. The students ____________ (read) English when the teacher came in. 13. Look! The monkey __________ (climb) the tree. 14. My mother __________ (come) to see me next Sunday. 15. I've lost my pen. _________ you ________ (see) it anywhere? 1. have, seen, saw 2. Has, finished 3. has, come 4. has gone 5. have worked, moved 6. ha ve made 7. ha ve , stayed 8. have, finished 9. goes 10. have, found 11. is 12. were reading 13. is climbing 14. is coming 15. Have, seen