现在完成时&过去完成时{PPT}.ppt

现在完成时(Present Perfect Tense)
肯定式
否定式
I/You/We/They have finished the work.
He/She/It has finished the work.
I/You/We/They have not finished the work.
He/She/It has not finished the work.
构成:
have(助动词) + (过去分词)
has(第三人称单数助动词) +
现在完成时(Present Perfect Tense)
疑问式
回答
Have I/you finished the work?
Has he/she finished the work?
Yes, you/I have.
No, you/I haven’t.
Yes, he/she has.
No, he/she hasn’t.
have not 常缩略为haven’t
has not 常缩略为hasn’t
用法
Have you had your lunch yet?
Yes, I have. I have just had it.(现在我不饿了)
表示过去发生或已经完成的动作对现在造成的影响或结果。
I haven’t seen her these days.
I have known Bob for three years.
I’ve been at this school for over two years.
They have lived here since 1982
She has taught us since I came in to this school.
某些动词的现在完成时可表示过去某一时间开始并一直持续到现在(包括现在)的动作或者状态,可以和表示延续的时间状语连用。表示持续动作或状态的是延续性动词。
I have already taught him some English.
John has never been to the space museum.
My boy has just started middle school.
现在完成时可以和already, never, ever, just, before, yet等连用。
I haven’t seen her these days.
I have known Bob for three years.
I’ve been at this school for over two years.
They have lived here since 1982
She has taught us since I came in to this school.
某些动词的现在完成时可表示过去某一时间开始并一直持续到现在(包括现在)的动作或者状态,可以和表示延续的时间状语连用。表示持续动作或状态的是延续性动词。
buy ( bought ) --- have / has had 买
borrow (borrowed) --- have / has kept 借
die ( died ) --- have / has been dead 死
leave ( left ) --- have / has been away ( from ) 离开
begin ( began ) --- have / has been on 开始
join ( joined) --- have / has been in 参加
--- have / has been a ( party) member
go (went) --- have / has been there / in 去
come ( came ) / arrive --- have / has been here / in
来/到达
Eg : I ___ the book for a day .
A. bought B. have bought C. have had
His father ____ since 1999.
A. died B. has dead C. has been dead
C
C
瞬间动词不能与 for, since, how long 连用
(1)这辆单车他买了三年了
He _______________ the bike ____ three years
(2) 这本字典我借了一星期了
I ___________ the dictionary ____ a week ago
(3) 这只狗死了一个半小时了
The dog