Mrs.Black _has been in_China since the summer of 1998,为什么是用has been in而不是用has been to?
问题描述：
Mrs.Black _has been in_China since the summer of 1998,为什么是用has been in而不是用has been to?
答
has been to是一个状态量不是一个持续量,现在是since 是从1998到现在,是一个时间段,所以用in