when did she go to beijing 还是went to beijing 对?就是她什么时候去的北京?
问题描述：
when did she go to beijing 还是went to beijing 对?就是她什么时候去的北京?
答
When did she go to beijing ? 已经有did助动词了，这里的动词就要还原。
答
When did she go to Beijing?
答
前者,一般疑问句中动词用原形
答
when did she go to beijing ？正确。