有读者问： 有人说 can (could)be 之后不可接 possible, 但我却见过这样的句子：
(1)I don't see how that could have been possible.
难道这是一个错句吗？
这个句子一点也不错。 can (could)be 之后完全可接一用作表语的形容词 possible, 再如：
(2)How this can be possible is beyond understanding.
(3)— Colonel Brandon gave me a living!
— Can it be possible?
(4)— I stole this.
— My dear husband, it can 't be possible!From whom?
(5)Could it be possible that they would go back on him now, at the very moment when he was at the threshold of a career?
顺便提及， can (could)还常与副词 possibly 连用， 以加强其语势，如：
(6)Mother, I could n't possibly go. Nothing could be worse for me.
(7)Can I possibly use your telephone? （possibly 在此表委婉客气）
