问题描述:
have done、 have been done的区别
1.been是代表被动语态么?
2.i have not seen him for a long time.he must have been very busy.
这里不能说他被很忙啊?那为什么会有been呢?
3.water说很少要用什么修饰?很多呢?不可数名词是都是这样的吗?water也不用加s吗?
1.been是代表被动语态么?
2.i have not seen him for a long time.he must have been very busy.
这里不能说他被很忙啊?那为什么会有been呢?
3.water说很少要用什么修饰?很多呢?不可数名词是都是这样的吗?water也不用加s吗?
问题解答:
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