Evenpeoplewhotakenoinsterestinartcannothavefailedtonoticeexamplesofmodernsculptureondisplayinpublicplaces这句话的cannothavefailedtonotice,cannot+have+过去分词表示对过去所作的不肯定的推测,那肯定形式

Question

Even people who take no insterest in art cannot have failed to notice examples of modern sculpture on display in public places
这句话的cannot have failed to notice,cannot+have+过去分词表示对过去所作的不肯定的推测,那肯定形式是不是must have been?
不是还有一种用法吗 情态动词+have+过去分词,如can have done 本能过做的（实际上没做）那他的否定形式cannot+have+过去分词那不就跟上面的用法一样了吗?我改如何区分呢?

Answer 1

情态动词 + have + 过去分词 是有的,不外乎 would / could / should / might 这些上的推敲但不是用can.
must 也行,语气就相对武断些.
这句如果要用肯定形式 取代 cannot have failed to notice 改写为 must have noticed 就得了.
语气软一点就用 would 或 should have noticed.