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靓掣魅影
可以不……疑问性：may sb do sthmay i have your key?我可以用你的钥匙吗肯定性：need not (to)do sthyou need not do that你可以不那样做（你用不着那么做）不可以 can not do sthyou can not smoke here.你不能在...
beetleleon
“可以不”是"不必"的意思=You needn't to "不可以"=You can not.....
emmazhaoyang
可以不you may not不可以you cannot，you mustn't，you shouldn't
孔雀凉凉
mustn't如:Imustn'tdoasyouorder;OrImustn'tdoitthoughyouorderme.
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