现在完成时讲解及练习-Tina修改知识交流.doc

现在完成时讲解及练习 Tina修改

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现在完成时讲解
（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 haven’t.
Have you not (Haven’t you) studied…?
Yes, I have. No, I haven’t.
Has he not (Hasn’t he) studied…?
Yes, he has. No, he hasn’t.
（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, for…, 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, yesterday, 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。
Exercise: 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.
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. ×
现归纳总结一下由非延续性动词到延续性动词的转换： 
   arrive到达---be here           begin(start)开始---be on
die死亡 ---be dead               come back回来---be back
leave 离开---be away (from)       borrow借来---keep     
  finish完成---be over               buy买---have
open打开 ---be open                join加入，参加---be in
close关闭---be closed               marry结婚--- be married      
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。

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.
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 ?
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.
14. My mother __________ (come) to see me next Sunday.
II. Choose the best answer.
1. How long have you _______ here?
A. come B. got C. arrived D. been
2. My grandpa died _________.
A. at the age of my 2 B. for 2 years C. when I was 2. D. my age was 6.
3. Jane has _____ to BeiJing. She will come back tomorrow.
A. been B. gone C. went D. never been
4. It is ten years _____ I last saw her.
A. after B. since C. for D. that
5.--Who will go to the station to meet Lorry?
--I will. I _____ her several times.
A. met B. have met C. had met D.will meet
6. --What a nice dress! How long _____ you _____ it?
--Just 2 weeks.
A. will, buy B. did, buy C. are, having D. have, had
7.--Do you know Lydia very well?
--Yes, She and I _____ friends since we were very young.
A. have made B. have become C. have been D. have turned
8. The Smiths _______ in China for 8 years.
A. has lived B. lived C. have been D. live
9. --Hello, this is Mr. Green speaking. Can I speak to Mr. Black?
-- Sorry. He ______ the Bainiao Park.
A. has been to B. has gone to C. went to D. will go to
10. --____ you ever ____ to the US?
-- Yes, twice.
A. Have, gone B. Have, been C, Do, go D. were, going
III. Rewrite the sentences.
1. I have been to Macau before. (改为否定句) 
I _________ _________ been to Macau before.
2. He hasn’t come to school because he was ill. (就划线部分提问)
______ _______ he come to school?
3. I bough a new bike just now. (用just改写)   
I ____ just ____ a new bike.
6. They have been here since 2000. (对划线部分提问)
_______ _______have they been here?
7. The old man _________ last year. He has _______ _______for a year. (die) （动词填空）
8. Miss Gao left an hour ago. (同义句转换)
Miss Gao has _______ ________ ________ an hour ago.
三、结束性动词转换为以下延续性动词或者表示可以延续的状态的短语。
1. Mr. Li began to teach English in this school in 1999.（同义句）
  Mr. Li ______  _______ English in this school since 1999.
2. The factory opened ten years ago.（同义句
  The factory _______  _____  ______ for ten years.
3. John left Beijing three years ago. （同义句）
  John_____  ______ ______  ______ Beijing for three years.
4. His company opened in 2003. （同义句
  His company _____  _____  _____ since 2003.
5. My father bought the car half a year ago. （同义句
My father ______  ______ the car ____ half a year.

六、用have / has been to / in, have gone to及go的各种形式填空。
1) Where is Jack? He __________ his country.
2) David ________ the park just now.
3) John _______ England since he came back.
4) The Smiths ______ Beijing for years.
6) _____ you ever ____ America? -- Yes, I _____ there many times.
7) I _____ this school since three years ago.
8) Where is Jim? He _____ the farm.
9) When_____ he _____? He _______ an hour ago.
10) Would you like to _____ to the zoo with me? ---Yes, but I _____ there before.
12) He often _____ swimming.
七 用never, ever, already, just, yet, for, since填空
1. I have _______ seen him before, so I have no idea about him.
2. Jack has _________ finished his homework.
3. Mr. Wang has taught in this school ________ ten years.
4. “Have you ________ seen the film?” “No, I have ________ seen it.”
5. “Has the bus left _______?” “Yes, it has _________ left.”
八. 用适当的时态填空：
1.She’s _____________ (live) here ever since she was ten.
2.Both of them ________________ (be) in Hongkong for ten days.
3.Both of them ____________ (come) to Hongkong ten days ago.
4. Half an hour __________ (pass) since the train __________ (leave).
6. _________ you _____ (find) your watch yet?
7. ---Are you thirsty? ---No I _________just _________ (have) some orange.
8. We ---- already _________ (return) the book.
11. My father _____ (read) the novel twice.
12. I _________ (buy) a book just now.
13. I _________ (lost ) my watch yesterday.

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