UC知道when and where he went -- yet
来源：百度知道 编辑：UC知道 时间：2024/04/29 21:28:20
A:is not known B:has not known
答案是A ~~~不懂，有yet怎么不用has，望能人们能讲出自己的见解
答案是A ~~~不懂，有yet怎么不用has，望能人们能讲出自己的见解
题目的意思是，他什么时候去的，去了什么地方，现在都还不知道．如果用has的话，即是用被动的完成时，答案应该是has not been known,所以B是错的．选A的话也可以了，表示的只是现在的状况．
yet不一定就要用过去时嘛，这里表示现在还没来
这里be known 是被知晓的意思。
如果选B，就应该为 has not been known
主动是：When and where he went
是陈述事实，他去哪什么时候去（这个问题）还没有决定呢。YET表示还，并不是要用完成时的限制。
这句话要用被动语态.并不强调对现在的影响.yet不一定就要用has,那个规则不是绝对的.这里一定是被动语态才可以.所以选A.把B改为has not been known也可以的.
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