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急求现在完成时的讲解,练习(附答案)!

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急求现在完成时的讲解,练习(附答案)!
讲解越详细越好,题目越多越好,但是希望题目质量高!
Grammar 现在完成时
现在完成时用来表示之前已发生或完成的动作或状态,但它的影响现在还存在;也可表示持续到现在的动作或状态.其构成: have (has) +过去分词.规则变化的过去分词与过去式的变化一样,在动词词尾加ed; 不规则变化的过去分词见不规则动词表,需要同学记忆.
现以see the film为例将现在完成时的肯定句, 否定句和疑问句列表如下:
肯定句:I/You/We/They have seen the film. He/She /It has seen the film.
否定句:I/You/We/They have not/ haven’t seen the film.
He/ She/It has not/hasn’t seen the film.
疑问句:Have I/you/they seen the film? Yes, you/ we/I/they have. No, you/ we/I/they haven’t.
Has he/she/it seen the film? Yes, he/ she/ it has. No, he/ she/ it hasn’t.
二、用法:现在完成时既涉及过去,又联系现在.用法一:表示过去发生或已经完成的某一动作对现在造成的影响或结果.常与just(刚刚),already(已经),never(从来没有),ever(曾经),before(以前),yet(仍然),once(一次),twice(两次),many times(很多次),how many times(多少次),so far(迄今为止),during the past(last)three years(最近三年来)等连用.
※ 副词的位置:①just常用于肯定句中,放在have / has后,He has just come .
②never表示否定, 放在have / has后, He has never visited the Great Wall.
③ever用于疑问句中,句型为: Have / Has+主语+ever +过去分词?“…曾经……过吗?”用于询问某人过去的经历.Have you ever been to the farm?
④before用于句末,The woman has never heard of that before.
⑤yet 用于句末或not 之后.Has the train arrived yet? No, not yet.
⑥already用于肯定句, have / has 之后或句末.We have already finished it.
⑦so far用于句首或句末. So far, we have visited the moon.
用法二:表示过去已经开始,一直延续到现在的动作或状态.时间状语有:
① for+表示一段时间的词语I have taught English for 19 years.
② since+表示过去时间点的词语He has been at this school since 1986.
③ since+表示过去的时间状语从句I have lived here since I was born.
④ since+一段时间+ago. I have known him since 20 years ago.
三、现在完成时态中可以和表示一段时间状语(for,since,how long, all one’s life)连用的动词必须是表示延续的情况或动作的动词,即延续性动词.如:be,have,know,live,work,study,learn,teach,keep,speak,talk,draw,wait,wear,walk,sleep,drive,write,do,clean等.
I have been a teacher for nearly 20 years. How long has he lived here?
四、延续性动词的现在完成时可和包括“现在”在内的(到说话时仍未结束)表示一段时间的状语连用.如this morning,today,this week,these days
He has been to Beijing three times this year. He has written two letters this morning.(说话时间在上午)He wrote two letters this morning.(说话时间在下午或晚上)
五、英语中还有一些动词的意义决定它们所表示的动作不能延续,只是一瞬间
就结束的动作,这类动词叫做“非延续性动词”,常见的有:come,go,arrive,reach,see,hear,close,open,leave,begin,start,lose,buy,fall,join,die,get up,become,borrow,lend,find,finish,receive等.这些动词可用于现在完成时,说明某个动作的结果还存在,但不能和表示一段时间的状语(how long,for,since)连用.He has come back.(√)He has come back for two hours.(×)
※ 但在否定句中,非延续性动词也可用表示一段时间的状语来修饰,如
I haven’t heard from my father for a long time. We haven’t seen him since 1999.
六、当终止性动词(非延续性动词)与表示一段时间的状语(how long,since,for, all one’s life)相矛盾时,改正错句的方法有如下几种:
(1)用副词ago把现在完成时的句子改为一般过去时.
He has come back for two weeks.(错)改为:He came back two weeks ago.(正)
I have lost my bike for ten days. (错)改为:I lost my bike ten days ago. (正)
(2)用“It is / has been+时间+since+一般过去时态”句型来改写.
He has joined the League for 3 years. (错)It is 3 years since he joined the League.
I have bought the book for 5 days. (错)It is 5 days since I bought the book. (正)
He has died for 20 years. (错)It is 20 years since he died. (正)
(3)用“时间+has passed+since+一般过去时态”句型来改写.
He has left home for 20 years. 改为:Twenty years has passed since he left home.
He has lost his pen for 2 days. 改为:Two days has passed since he lost his pen.
(4)用系表结构来改写.
He has died for 20 years. 改为: He has been dead for 20 years.
The factory has opened since 1999. 改为:The factory has been open since 1999.
How long has he left? 改为:How long has he been away?
(5)用相应的延续性动词替代非延续性动词.
He has bought the book for two weeks. 改为:He has had the book for two weeks.
常见的相应转换形式如下:
borrow / lend→keep, buy→have, finish / end→be over, arrive /come / go / move / reach /get to→be in /at / be here /be there, begin / start→be on , open→be open , close→be closed, die→be dead , leave→be away(from),go to school→be in school / be a student, get up→be up, fall asleep→be asleep , fall ill→be ill, get to know→know, lose→be lost, become→be, return / come back / get back→be back, join→be in / be a…member, join the army→be in the army /be a soldier, receive / get a letter→have a letter , catch / get a cold→have a cold, begin to study→study,
他参军已有三年.He has joined the army for three years.(错)改为:
He has been in the army for three years / since three years ago.
He has been a soldier for three years / since three years ago.
He joined the army three years ago.
It is three years since he joined the army.
Three years has passed since he joined the army.
(1)He came to our village two years ago.=He our village since two years ago.
(2)He left home three days ago=He home for 3 days.
(3)I bought the watch 2 weeks ago=I the watch since 2 weeks ago.
(4)It is 5 days since I borrowed the book=I the book for 5 days.
(5)The film has begun= The film for half an hour.
(6)I got to know him 10 years ago=I him for 10 years.
(7)There is a factory=There a factory for 20 years.
(8)Our school opened in 1960=Our school since 1960.
七、现在完成时中应注意的几个问题
1. have been to 和have gone to的区别
have been to 强调“去过”,现已不在那里,如:
He has been to the USA three times.
他到美国去过三次.(过去“到美国”,现在已“不在美国”)
have gone to主要强调的是“去了”,现在人不在说话的现场,如:
--Where's your mother? --你妈妈在哪?
--She has gone to the hospital. --她去医院了.
2. have been to 和have been in的区别
have been to强调人“已回到原地”,后面可接表示“次数”的状语.
eg. ① She has been to Shanghai only once.
②--How many times has he been there? --He's been there many times.
have been in表示某人“已在某地停留一段时间,现仍在那里”,其后常带表示一段时间的状语.
eg. ①They have been at the bus stop for half an hour.他们在车站呆了半小时.(现在仍然在车站)
②We have been in Xi'an for two weeks.
我们在西安呆了两个多星期.(现仍在西安)
③How long have they been in China?
他们在中国呆了多长时间了?(仍在中国)
八、如何通过与一般过去时做比较,进一步掌握现在完成时?
一般过去时和现在完成时的动作都发生在过去,但意义却不同.
(1)一般过去时只表示过去的动作或状态,和现在不发生关系.
现在完成时表示过去发生的某一动作对现在造成的影响,强调的是现在.
如:I learned ten English songs(说明过去学过,现在是否记得,不是本句的内容)
I have learnt ten English songs.(learn发生在过去,但强调我现在懂英语歌曲)
I cleaned the blackboard half an hour ago.(只说明“擦”和其发生的时间)
I have cleaned the blackboard.(说明现在黑板是干净的)
The teacher has written some new words on the blackboard(黑板上现在有单词)
The teacher wrote some new words on the blackboard(黑板上现在没有单词)
(2)一般过去时可以和表示过去的时间状语连用,如:yesterday, last year, three days ago, just now, 等.现在完成时不能和表示过去的时间状语连用,其时间状语可以是since…,for… , just, ever, never, before, already, yet , so far, all one’s life等
八、规则动词的过去分词和它的过去式相同,即在原形后加-ed(-d).已学近80个不规则动词的过去分词约有半数也和它的过去式相同,分类如下,利于记忆:
1) 原形中的元音字母有变化:
get-got-got, sit –sat-sat win-won-won spit- spat- spat shine –shone- shone
find- found- found hold-held-held meet- met-met stand- stood-stood
understand-understood-understood feed- fed-fed hang-hung-hung
2) 原形中的辅音字母有变化:
make-made-made spill-spilt-spilt have/ has-had-had build-built-built
send-sent-sent lend- lent- lent spend-spent-spent
3) 在原形后加t或d:
spoil-spoilt-spoilt learn-learnt-learnt mean-meant-meant hear-heard-heard
pay-paid-paid say-said-said lose-lost-lost lay-laid-laid
4) 原形中的元音字母和辅音字母都有变化:
feel-felt-felt smell-smelt-smelt spell-spelt –spelt keep-kept-kept
sleep-slept-slept sweep-swept-swept leave-left-left sell-sold-sold
tell-told-told catch-caught-caught teach-taught-taught buy-bought-bought
bring-brought-brought think-thought-thought wear-wore-worn
5) 与原形相同:
hit-hit-hit hurt-hurt-hurt let-let-let put-put-put read-read-read
set-set-set shut-shut shut cost-cost-cost cut-cut-cut
还有些不规则动词的过去分词与过去式不相同,为便于记忆,也分类如下:
1)原形中的元音字母有变化:
ring-rang-rung sing-sang-sung drink-drank-drunk swim-swam-swum
begin-began-begun sink-sank-sunk
2) 在原形上加-en:
eat-ate-eaten fall-fell-fallen ride-rode-ridden write-wrote- written
be-was/were-been rise-rose-risen forget-forgot-forgotten
3)在原形上加-n:
see-saw-seen give-gave-given drive-drove-driven take-took-taken
mistake-mistook-mistaken draw-drew-drawn blow-blew-blown
grow-grew-grown know-knew-known show-showed-shown throw-threw-thrown
4)在过去式上加-n:
steal-stole-stolen break-broken–broken choose-chose-chosen speak-spoke-spoken wake-woke-woken
6) 与原行相同:come-came-come run-ran-run become-became-become
7) 原形、过去式和过去分词都不相同的:
do-did-done go-went-gone fly-flew-flown lie-lay-lain
个别动词有两个过去式和过去分词,一个为规则变化,另一个为不规则变化:
learn-learned-learned shined-shined smell – smelled-smelled
learnt-learnt shine shone-shone smelt-smelt
wake -waked-waked spelled-spelled
woke-woken spell -spelt –spelt

【典型例题】
1. — Oh, Mrs. King, your necklace looks nice. Is it new?
— No, I ____ it for two years.
A. had B. have had C. bought D. have bought
2. His grandfather _____ for over two years.
A. has died B. has been dead C. has dead D. died
3.Uncle Li can speak English very well because he _____ England for 5 years.
A. has gone to B. has been to C. has come to D. has been in
4. — Where is Mr. Zhang? — He _____ London.
A. has been to B. has been C. has gone D. has gone to
5. — _____ to the United States? — No, never, but I went to Canada a few years ago.
A. Have you been B. Have you gone C. Did you go D. Will you go
6. I haven’t seen you _____ last Friday.
A. for B. since C. from D. on
7. — John, you ____ the computer game for two hours. It’s bad for your eyes. Stop, please!
— OK, Mum.
A. played B. have played C. were playing D. play
8.I won’t go to the concert because I _____ my ticket.
A. lost B. don’t lose C. have lost D. will lost
Exercise: Fill in the blanks with the right verb tense:
1. It (rain)for a week.
2. I don’t know this woman. I (meet, never)her.
3.-Let’s go to the cinema.-No, I (see, already)the film.
4. We (finish, not)our homework yet. Will you wait a minute?
5. John (come, not)yet. He will be back in a minute.
6. Mr. Green often goes to America. In fact, he (be)there ten times.
7. -Where’s John? -He just (go)to the teachers’ office.
8. She (study)English since she was ten. She (begin)to study English when she was ten.
9. Jim isn’t here. He (go)to the library. He (go)there an hour ago.
10. He (travel, never)on a train in her life.
11. I (buy)the bike two weeks ago. I (have)this bike since the beginning of this month. I (have)it for two weeks.
12. Great changes (take place)in those villages in the last ten years, Great changes (take place, also)in my home-town in the last ten years.
13. How many times you (phone)me these days? you (phone)me this morning?
14. Tom can’t get into the room because he (lost)the key to the door.
15. I (look)for the dictionary, but I (find not)it yet.
16. - the new programmes (start)yet?-No, they (plan,still)
18. We (live)in Shanghai from 1989 to 1999. We (live)for 10 years.
19. They can’t go with us. They (finish, not)the work yet.
20. You (change, not )your mind, haven’t you?
21.We must pay for the library book if we (lost)it.
22. He has already finished his homework.(改为否定句)
He finished his homework .
23.- I hear your father (be)to Japan once.-Yes. He (go)there last year.
24. -When you (buy)the book?-I (have)it for two weeks.
25. Such a thing (happen, never)in the village before.
现在完成时态1have / has +done,请注意与一般过去式的区别
I have already worked out this math problem? (改为否定句)
I worked out the math problem .
He has already finished the book.(改一般疑问句并做肯定否定回答)
he the book ? Yes, he . No, he .
I have a book.. (改一般疑问句并做肯定和否定回答)
you a book? Yes, I . No, I .
I have got a book. (改一般疑问句并做肯定和否定回答)
you a book? Yes, I . No, I .
He has got a book. (改一般疑问句并做肯定和否定回答)
he a book? yes, he .No, he .
You have done your homework, you ?(改为反意疑问句)
He has never been abroad, he? (改为反意疑问句)
We have got little milk, we? (改为反意疑问句)
Jim has got a pen. Lucy has got a pen too.(改为同义句) Jim has got a pen, Lucy.
I think you never (hear) such a thing.
you (know) where your sister has (go)?
I think you (be) all right soon.
If you (lose) a book, you (pay ) for it.
I (tell) you about the accident as soon as I (finish) the work.
you ( read) the book yet?
Tom just (find) his cat.
He (not see) the film yet. So he see) it this evening.
I (have) my lunch already.
You (find) your lost book? Yes, I (find) it hours ago.
You needn’t tell him about it. I already him about it.(tell)
--Have you ever (be) to Tibet? --Yes, I . --when you there?(go) --Three weeks ago.
--Jim, you (write) a letter to your aunt? --yes,I .
I (write) it just now.
Have you (return) the ladder yet? No, not .I (return) it soon.
I (有) the book Harry Potter.
So far, I (not get) a letter from him.
Until now, she already (write) three books.
In the past few years, we (build) a lot of buildings.
In two or three years, the city (become) the most beautiful one in China.
This is the first time I (visit) the Great Wall.
We already (know)each other before.
We (get)to know each other three years ago.
They just (get) in touch with each other.
They (get) in touch with each other just now.
I am sorry. I (forget) your name.
I am sorry I (forget) to bring you photos.
--How many times you ever to Shanghai?
---I ever there three times.(去过)
--Where is Jim?--He to the teachers’ office(去了)
33. -- you to the hospial yet? .(去过)
--yes, I (go)to see Doctor Li this morning and he (give)me some medicine.
-- you (take) it.? -- yes, I it just a moment ago.(take)
She has worked in the school for three years. (改为同义句)
She has the school three years. .
I borrowed the book three days . (39和40为同义句)
I (借) the book for three days
She (learn) English for three years.
She (learn) English three years .(用since)
She (learn) English since 2002.
Last year he often (run) for two hours a day. Until now he for two years.(run)
He (live) here since he (move) here.
Our maths teacher (talk) to a boy when I (enter) the room
The Greens (be) to the Great Wall twice.
I (give) the message to her as soon as he (come) back.
There (be) no books on the shelf a moment ago.
Look, the Greens (have) supper. But we just (eat) it.
In one or two years, she (become) a doctor.
He died two years ago.(改为同义句) He for two years.
I bought the pen three hours ago.(改为同义句)
I (有)the pen for three hours.
I joined the army three years ago. (改为同义句)
I a member of the army three years.
I the army for three years.
It three years he the army.