内容正文:
Unit 1 Past and present
第3课时Grammar
1. use the present perfect tense to make positive statements;
2. use the present perfect tense to make negative statements;
3. use the present perfect tense to ask and answer questions;
4. form the past participles of regular and irregular verbs.
经典短语默写
1. ________________________ 完成他们的家庭作业
2. ________________________ 参观中国
3. ________________________ 修理超过十辆自行车
4. ________________________ 自从周一以来
5. ________________________ 互相见面
6. ________________________ 长达数年
7. ________________________ 回来
8. ________________________ 教我们很多有关中国的历史
9. ________________________ 看一些电影
10. ________________________ 上周六
11. ________________________ 关于在北京的变化
12. ________________________ 在上个世纪期间
13. ________________________ 了解更多北京的过去和现在
14. ________________________ 听说
15. ________________________ 打算再看一遍
重难句型过关
1. 这本书我已经读过许多遍了。
I ______ ______ ______ this book many times.
2. 他们已经完成了家庭作业。
They ______ ______ their homework already.
3. 约翰从未到访过中国
John ______ ______ ______ China.。
4. 自星期一以来李先生已经修理了10多辆自行车。
Mr Li ______ ______ over ten bicycles ______ Monday.
5. 我父母还没有回来。
My parents ______ ______ ______ ______.
6. 哦,我想我听说过这部电影
Oh, I ______ I ______ ______ about the film. 。
7. 你打算再看一遍吗?
Do you ______ ______ ______ it ______?
现在完成时基本结构:
①肯定句:主语+have/has+动词的过去分词+宾语.
Eg:
1. He has already had his lunch.
2. I have just finished my homework.
②否定句:主语+have/has+not+动词的过去分词)+宾语.
Eg:
1. I have not seen the movie yet.
2. She hasn’t eaten it.
③一般疑问句:Have/Has+主语+动词的过去分词+宾语.
Eg:
1. Have you finished the work?
2. Has she arrived here?
3. Have they eaten supper?
④特殊疑问句:特殊疑问词或词组+一般疑问句(have/has+主语+过去分词(V-ed)+其他)
Eg:
1. Where have you been? 你去哪儿了?
2. How many times have you been to Beijing? 你到过北京多少次?
3. Who has taken my book? 谁拿走了我的书?
4. Why have you not written to me? 你为什么没给我写信?
5. When have you finished your work? 你什么时候完成工作的?
现在完成时用法
1. 现在完成时用来表示过去发生或已经完成的动作对现在造成影响或后果。
可以理解为:I have already posted the photo.
我已经把照片寄走了。强调post对现在的影响"照片不在这里"。
2. 现在完成时可以用来表示发生在过去某一时