don't can't区别,

don't can't区别, don't 和can't 有什么区别什么时候用can't,什么时候用don'tt 能否解释一下musn't,needn't ,don't have to,can't ,couldn't的区别? can't 和don't 有什么区别? 请问王老师can't与don't的区别? I don't 与 I can't 的区别 i don't cry和i can't cry区别? don't与can't的区别,怎么用? I don't can find it和I can't find it的区别 I don’t think I can和I think I can’t有什么区别? oughtn't, mustn't, can't区别 do not 和 can't的区别 I don't speak English和I can't speak Englis