it is some time since+...与it has been some time since+...什么区

问题描述:

it is some time since+...与it has been some time since+...什么区别?
1个回答 分类:英语 2014-09-18

问题解答:

我来补答
没有区别.现在完成时态中,it has been+时间,常可简写成it is +时间
 
 
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