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P4语言点  

2014-02-21 12:51:51|  分类: 课文语言点 |  标签: |举报 |字号 订阅

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生词:continue           connection             yet              recently             statement               fitted             written
past            
词组: the present perfect tense                continue with sth./ to do/ doing               have a connection with
till now             make positive statement                the past participle               over the past century       
句型: They hace finished their homework already.                   My parents have not come back yet.
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 month.
类似的还有 borrow =have kept, begin= have been on等
或者说:
It is two years since he came to Beijing. 
It is three weeks since he bought that book.
It is one and a half years since he joined the 
Army. 
It is nine months since his grandma died.
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