现在完成时复习课件.ppt

Our slogan:
He who has never been to the Great Wall isn’t a true man.
现在完成时
Revision
The Present Perfect Tense
现在完成时谓语动词的构成:
1. I _____________(finish) homework already.
2. He ___________(learn) English for three years.
I/ We/You/ They have …
He/She/It has …
have finished
has learned
助动词have/has +pp(过去分词)
句式变换:
1. He has finished his homework.(变为否定句)
2. They have visited China before.(变为一般疑问句,并做肯定回答)
He hasn’t finished his homework.
Have they visited China before?
Yes, they have.
?
?
和yet 有哪些不同吗?
想一想
现在完成时(一)
.
:
already, yet, ever,never,just,before等
和 yet 的区别
already 多用于肯定句;yet多用于否定句和疑问句末。
注意:如果肯定句中含有already或just ,在变成否定句或疑问句时,要把句中的already 或just 转换成yet.
I haven’t seen the film yet.
have already finished my homework.
Have you finished your homework yet?
3. Mother has just cleaned the house.
Mother hasn’t cleaned the house yet.
1. I have already seen the film.
________ (do) my homework already.
_____________(not finish) his homework yet.
______ never ______ (see) this book before.
_____ just _______(clean) the house.
__________(visit) China before.
have done
has not finished
have
seen
has
cleaned
has visited
我能行
用动词的适当形式填空:
现在完成时(二)
?
?
和since有什么不同吗?
现在完成时(二)
,一直延续到现在, 并且有可能继续延续下去.
:
通常和for, since 引导的时间状语连用.