文档介绍：Unit 8
Have you read Treasure Island yet?
Section A Grammar Focus
现在完成时态 present perfect
Grammar Focus
Have you read Little Women yet?
Yes, I have./No, I haven't.
Has Tina read Treasure Island yet?
Yes, she has. She thinks it's fantastic.
Have you decided which book to write about yet?
Yes, I have. I've already finished reading it. It was really good.
现在完成时：
表示过去发生或已经完成的某一动作对现在造成的影响或结果，或从过去开始一直延续到现在的动作或保存的状态。
结构： 主语+ have / has + 动词的过去分词
一般疑问句： have / has … ?
Yes, I have. No, I haven’t.
Yes, she has. No, she hasn’t.
1. 现在完成时动词构成
have /has + v 过去分词
助动词
否定
haven’t
hasn’t
疑问
Have you…?
Has he…?
常与下列时间状语连用：just , already, yet,
ever, never, before, several times
现在完成时
。和already，never,ever,just,before,yet等状语连用。
，持续到现在的动作或状态，
常与for或since引起的一段时间状语连用。
动词构成：have/has+v过去分词
have breakfast
I have just had my breakfast.
(现在我不饿)
I’m not hungry now
moved here
in 2004
I still live here
I have lived here for three years.
I have lived here since 2004/three years ago.
now
past
2. 现在完成时动词可以表示开始于过去持续
到现在(也许还会继续进行下去)的动作或状态。
1) I have studied English since last year.
我从去年开始学****英语。
2) She has lived in Beijing for five years.
她住在北京已经五年了。
注意: come, go , leave, arrive, buy, lose, receive,
join, die, bury 和marry 等动词所表示的动作是
一时的, 不能延续的, 故不能与for …, since …
等开头的表示一段时间的状语连用。不过, 这些
词用于否定句则可以与表示持续的时间状语连用，
即动作的不发生是可以持续的。
不能说: *He has come to Beijing for two years.
*He has bought that book for three weeks.
*He has joined the Army for one and a half years.
*His grandma has died for nine months.
* I have received his letter for a month.
可以说:
He has been in Beijing for two years.
He has had that book for three weeks.
He has been in the army for one and a half years.
His grandma has been dead for nine months.
I haven't received his letter for almost a
或者说：
It is two years since he came to Beijing.
It is three weeks since