现在完成时for-和since用法讲解学习.doc

现在完成时for 和since用法

精品资料
现在完成时二
用法：过去完成时表示过去发生的动作或存在的状态一直持续到现在（包括现在在内），常与for和since引导的时间状语连用，动词需要用延续性动词。
如：Mr.Green has been in China for 10 years .(格林先生来中国10年了)
The film has been on for 20 minutes.(电影开始已经20分钟了)
Since 与for的区别： for后面跟一段时间 如： for three days for 2 years 等
+ 过去的时间点 ：since 2004
Since
+ 一段时间 ago ： since two minutes ago
+ 过去时的句子： since I came to this school
用since 和for 填空：
1. I have kept the book _______ a week , I must return it on time .
2.We have learned English _______ 5 years ago, so we have learned it ______ 5 years.
3.Miss Li has taught maths ________ she came to this school ..
4.I have had a cold _______ yesterday.
5.The workers have worked _______ 10 hours . They are very tired.
6.Great changes have taken place in China ______ it was founded.
7.Our teacher has studied Japanese ______ three years.
8. She has been away from the city ______ about ten years.
9.. It’s about ten years __________ she left the city.
短暂性动词的完成时态不能和表示一段的时间状语连用，当它需要与表示一段时间的时间状语连用时，通常需进行转化，见书119页。
练习：
一，写出下列动词的过去式和过去分词形式。
1. be --______ -- ________ 2. come --______--________ 3.see -________ -______
4.study --______ --________5. take --______ ---＿＿＿＿　６make --_____ --_______
7.go --______--_________8.have -______ --_________ 9.learn --______ --________
10.do--______ _________ 11.stop --_______ --_________ 12.tell -______ --_______
13.find --_____ --_______14.carry --______--_________15.change-______--_______
二 用所给词的正确形式填空。
1. Is Jack in the classroom ? No , he ___________(去) the playground for the match.
2.Our life _________(change) a lot in recent years.
3.She _______(去) Canada twice ,it’s so beautiful.
4.Mary _______(not come) back yet ,I’m waiting for her.
5.____ you ______(be) to Tibet ? -- NO, never.
6.There is a new restaurant ,it’s said that it __________(开业) for no more than a week.
7.Hurry up. The film _________(开始) for ten minutes.
8.We ____________(在) this school for two years.
9.Alice won’t go with you because she _________(see) the film twice.
10.Our English teacher ,Mrs. Black ,_______ in our school since 1998.(teach)
11.She and I _________(成为) friends since we met in Tangshan last year..
12.He ________(离开) home for two years .Two years ______(be) a long time
1.3.She_____________ (live) here ever since she was ten.
14..Both of them ________________ (be) in Hongkong for ten days. 
15..Both of them ____________ (come) to Hongkong ten days ago.
16. Half an hour __________ (pass) since the train __________ (leave).
三 句型转换：
1. I have been here for about 15 years.
_____ ______ ______ you _______ here?
2. His little dog died four days ago (同义句)
His little dog _____ ______ ______ for four days.
His little dog has been dead _____ four days ago.
It _____ / ____ _____ four days since his little dog ______ .
3. They bought a book two hours ago .
They _____ _____ a book ______ two hours ago.
They ____　＿＿＿＿　a book ______ two hours.
It is two days since they ______ the book.

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