don't 一般用在I,you(无论翻译成你还是你们,都当成复数),they后面（你可以理解成不只一个人的时候就用它．当然,I是例外)
doesn't一般用在he,she,it,the book.my mom(名词单数)后面.
don't和dosen't的用法有什么区别?
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