是不是 | shì bù shì | is or isn't / yes or no / whether or not | |
能否 | néng fǒu | whether or not / can it or can't it / is it possible? | |
与否 | yǔ fǒu | whether or not (at the end of a phrase) | |
问客杀鸡 | wèn kè shā jī | lit. asking guests whether or not to butcher a chicken for them (idiom) / fig. hypocritical show of affection (or hospitality) |