must not 和mustn't有什么区别?还有can't和can not有什么区别?

must not 和mustn't有什么区别?还有can't和can not有什么区别?
must not 和mustn't有什么区别?还有can't和can not有什么区别?

must not 和mustn't有什么区别?还有can't和can not有什么区别?
没区别,彼此等同,和is not=isn't 一样.不过在正式文章或文件里就不能用缩写体

没区别一个是缩写一个是全写