Mr Wang is my good friend.We _____-each other since 2005.A.knew B.have known C.had known
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.
为什么是have known 而不是had known 都是完成时啊.
英语人气：970 ℃时间：2019-08-25 06:59:02
优质解答
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.
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