第一人称用do 第三人称用does e.g.Do you like music?... Where does she live? do用在表示不允别人做的祈使句可以使用 e.g.Don't be silly. Don't touch ! 与 so 或 nor 连用,表示两人或两组事物的情况相同 e.g.You know that's true, and so do I. We don't forget that. Nor does he.我们没有忘记那事,他也没有 再就是回答一般疑问句的时候用 No,I do not. Yes,he does.什么的简单回答 They say they don't care, but they do. 还有啊,我们英语老师讲过“do”用在句子里有时表强调(在没有其他助动词时,用来强调主动词) e.g.Veronica, I do understand.韦罗妮卡,我确实懂了