When do you came to China?
问题描述：
When do you came to China?
答
when did u come to china
答
不对啊。你用的came,如果表过去，应为When did you come to China?
如果表将来，When will you come to China? When do you come to China?口语中勉强对，但做选择题不行。
问句中的时态用助动词（can could do did will shall……）表示，动词应为原型
答
问将来的：when will you come to china.
问过去的：when did you come to china.
答
When did you come to China
答
when will you come to china..你什么时候来中国.表示将来.
when did you come to china.是说,你以前什么时候来的中国呀?