题目内容：

Many of the crimes have gone___,because some people dare not report them to the police.
A unnoticing B unnoticed C to be unnoticed D to have been unnoticed.为何要选B 如果是过去分词做定语,我不明白unnoticed为什么不放在crimes的后面呢?

优质解答

unnoticed 表示状语,表示状态.
如果放在crimes后面就是定语了.就等同于unnoticed crimes了