have been used 与 have usedThe salt ___(use)up already.I have to go and buy some为什么要填 have been used 而不能是 have used?

问题描述:

have been used 与 have used
The salt ___(use)up already.I have to go and buy some
为什么要填 have been used 而不能是 have used?

表示被动啊 盐是被用的 所以要用被动语态

首先是要用完成时,因此是have done的形式
其次这个是说盐被用光了 要用被动语态的,因此是have been used

被动语态,盐是被用完的

已经被用完了,所以用现在完成时的被动啊