Mr Wang is my good friend.We _____-each other since 2005.A.knew B.have known C.had known

分类: 作业答案 • 2021-12-03 11:27:37

问题描述：

Mr Wang is my good friend.We _____-each other since 2005.A.knew B.have known C.had known
为什么是have known 而不是had known 都是完成时啊.

答

had known 是过去完成时,前面必须要有过去式出现,而前面句子是现在时,只能用现在完成时have known.