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. Its 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 -_ -make -_ -_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 ,its so beautiful.4.Mary _(not come) back yet ,Im waiting for her.5._ you _(be) to Tibet ? - NO, never.6.There is a new restaurant ,its 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 wont 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 time1.3.She_(live)hereeversinceshewasten.14.Bothofthem_(be)inHongkongfortendays.15.Bothofthem_(come)toHongkongtendaysago.16.Halfanhour_(pass)sincethetrain_(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. 仅供学习与交流，如有侵权请联系网站删除 谢谢3