能否 | néng fǒu | whether or not / can it or can't it / is it possible? | |
能不能 | néng bù néng | can or cannot? / Is it possible? / Can we do it? | |
可否 | kě fǒu | is it possible or not? | |
会否 | huì fǒu | can or cannot / is it possible? | |
难不成 | nán bù chéng | Is it possible that ... ? |