一个英语语法问题……Have you ever done ~Did you ever do ~这两句句型有什么区别……

Did you ever...和Have you ever...有什么区别?什么时候用Did you ever...什么 have you ever 和 do you ever 有什么区别? Have you ever、did you ever、do you ever的区别,及答句形式 did you ever 和 do you ever 区别? do/did you ever.. have you ever 和 did you ever do you ever 与 have you ever 的区别 have you ever been to China和have you ever been China有什么区别? have you ever.是什么句型 初二下册英语.句型：Have you ever been to……? What have you ever done?怎么回答? did you ever 和have you ever哪个对