内容正文:
牛津版八年级英语上册
Unit 5 Educational exchanges
Date:_______ name:_______
【语法专项】— 现在完成时
一、概念:
1. 表示过去发生的动作对现在造成的影响或结果。
She has been ill for three days. (她病了三天了。)
2. 表示过去发生的某个动作一直持续到现在,还有可能继续延续下去。
We've known each other since we were children. (我们从小就认识。)
I have been a member of the Party for 10 years.
二、构成:
(一)现在完成时由“助动词have, has + 过去分词”构成
1. 肯定句:主语+ have/has + 动词的过去分词+ 其它
I have finished my homework.
注意:have与has如何选择?
规律:I / You / We / They have = I’ve / You’ve / We’ve / They’ve
He / She / It has = He’s / She’s / It’s (第三人称单数用has,其余全用have)
2. 否定句:主语 + have/ has + not + 动词的过去分词 + 其它。have/has与not
的缩写形式分别为haven’t 和hasn’t.
My father hasn’t come back yet.
3. 一般疑问句: Have / Has + 主语 + 动词的过去分词 + 其它…?
肯定回答:Yes, 主语+ have/ has.
否定回答:No, 主语+ haven’t/ hasn’t.
---Have you ever read this book?
---Yes, I have. / No, I haven’t.
4. 特殊疑问句:特殊疑问词 + have/has + 主语 + 动词的过去分词 + 其它…?
Where have you gone today?
(二)动词过去分词的构成规则
1. 规则变化
1 大部分动词在词尾直接加-ed
clean cleaned