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现在完成时
构成:主语+助动词have,has+过去分词
用法:
2)表示过去发生的和现在有某种联系的动作,常和just,usually,already,since等时间副词连用
I have just had lunch.(饱了,不用再吃了)
He has had a cup of tea.(不渴了,不用再喝)
They have already had their holiday.(不能再度假了)
The boy has already read the book.(已经知道书的内容了,不用再看了)
3)询问别人是否做过某事一般用现在完成时:
Have you finished your homework?
Have you been to Beijing?
Have he seen the film?
4)表示开始于过去并持续到现在的动作
I have lived in Beijing for twenty years.
I have worked for this school for 1 year.
5)表示一种经历,经验:去过…地方,做过…事情,经历过…事情
I have never had a bath.
I have never seen a film.
I have never been to cinema.
I have ever been to Paris.
Have been to表示去过,have gone to表示去了
I have been to London.(人已经回来)
He has gone to London.(人还在那里)
6)表示一种结果,一般不和时间副词联用
I have lost my pen.
I have hurt myself.
He has become a teacher.
She has broken my heart.
句型变化:
★变疑问句将助动词移到句首,变否定句在助动词后面加not.
e.g.Have you lost your pen?I have not lost my pen.
★肯定回答及否定回答
Yes,I have.No,I have not.
★特殊疑问句:
What have you done?
What has he done?
一般过去时与现在完成时的区别:
凡是有明确的表示过去的时间状语的句子为过去时
注意:有些动词表示的动作有一个终点,不能再延续,因此不能和表示一段时间状语连用
错:I’ve left Beijing for 3 days.
对:I left Beijing 3 days ago.I have been away from being for 3 days.
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