You must do you are homework on time改为祈使句 并讲出为什么,

You must do you are homework on time,needn't you? 1、must表示“必须”时,疑问部分用mustn’t.如： We must keepit as a secret, mustn’t we? 我们必须对此保守秘密,是吧?2、must表示“有必要”时,疑问部分用nee...