i don't know anything,或i know nothing.i don't know nothing就双重否定了。
i don't know nothing我什么也不知道i don't know nothing我不知道任何事
口语不用那么重视语法的就像我们说吃了吗你从语法就讲不通了
http://www.usingenglish.com/poll/150.html看看这个吧老外也搞不定在讨论????????