牛津上海版高一上学期Unit1基础语法讲解
发布时间:2020-04-29 来源:文档文库
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牛津上海版高一上学期Unit1基础语法讲解
高一上学期U1基础语法讲解
一、本节内容
(一)过去完成时 1.过去完成时:
1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态。
2.时间状语:recently, lately, since…for…,in the past few years, etc. 3.基本结构:have/has + done 4.否定形式:have/has + not +done. 5.一般疑问句:have或has提前
概念:过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作,即过去的过去( past-in-the-past )
----|-------------------------- |-------------------------------|---------------------------->
那时以前 那时 现在
构成:过去完成时由"助动词 had + 过去分词"构成,其中 had 通用于各种人称。 They had already had breakfast before they arrived at the hotel.
She had finished writing the composition by 10 :00 this morning.
2、过去完成时的判断依据:由时间状语来判定 1 ) by + 过去的时间点。
Eg: I had finished reading the novel by nine o'clock last night. 2 ) by the end of + 过去的时间点。
Eg: We had learned over two thousand English words by the end of last term. 3 ) before + 过去的时间点。
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牛津上海版高一上学期Unit1基础语法讲解
Eg: They had planted six hundred trees before last Wednesday.
3.课堂练习:
一.用动词的适当形式填空
1. We _____________ (paint the house before we ______________ (move in. 2. That rich old man _____________ (make a will before he _____________ (die. 3. They _____________ (study the map of the country before they ________ (leave. 4. The robbers _____________ (run away before the policemen_______ (arrive. 5. I __________ (turn off all the lights before I ____________ (go to bed. 6. Paul __________ (go out with Jane after he __________ (make a phone call. 7. Tom __________ (say he ___________ (read the book twice. 8. Our plan ____________ (fail because we _____________ (make a bad mistake. 9. When the chairman ______________ (finish speaking, he _____________ (leavethe hall. 10.The Reads __ ______ (have lunch when I ________________(get to their house.
二.句型转换
1.I had sold the ticket when she came.(改否定句) 2.She had sung a song to us before she danced.(改否定句)