Every means _but without much result.A.have been tried B.has been_英语解答

Every means _but without much result.A.have been tried B.has been tried C.have tried D has tried.
选哪个,为什么?

人气：471 ℃　时间：2020-03-27 08:05:30

解答

B means 是一个单复数同形的词.Every means 每一个方法,所以用单数.而且是已经被尝试.所以用被动.请问，为什么不选，has tried.每种方法已经被尝试，所以要用现在完成时的被动。