我父亲已经到达中国了。
My father has been in China for a week. 我父亲已经在中国一个星期了。
(3)在否定句中,非延续性动词也可以与时间段连用。
e.g. I haven’t borrowed books from the library since last year. 自去年以来我就没有在图书馆借过书。
Jim hasn’t come back for a year. 吉姆已有一年没回来了。
6、现在完成时的几种常见的句型转换。
现在完成时可以转化成一般过去时,还可以转化成“It is/has been +时间段+since从句(用一般过去时)”等句型。
e.g. Jim has been back for a month. 吉姆已经回来一个月了。
= Jim came back a month ago. 吉姆一个月前就回来了。
= It is/has been a month since Jim came back.自吉姆回来已经有一个月了。
= A month has passed since Jim came back.
I have kept the book for two days.
= I borrowed the book two days ago.
= It is / has been two days since I borrowed the book.
&n
www.dbk123.com
bsp; = Two days has passed since I borrowed the book.
7、现在完成时和一般过去时的区别:
现在完成时强调的是过去的动作对现在的影响,它和现在有密切的联系。现在完成时经常会出现下列的标志词。
如:already, yet, just, ever, never, several times, before, so far, for +时间段, since +时间点或从句等。一般过去时强调的是动作发生的时间、地点,不涉及对现在的影响,所以凡含有表示过去的时间状语的句子,都必须用一般过去时,不能用现在完成时。
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