1) Why can't you do as you're told ?
你怎么不听话呀?
2) Why can't you do as you're told (ie be obedient) ?
你怎麽不听话呀?
3) Why do you keep silent?
你怎么不说话？
4) Why not upgrade it?
你怎么不升级呢?
5) Why haven't you gone yet, eh?
你怎么还不走哇?
6) How do you sell it?
它怎么卖呀？
参考词条