你能不能告诉我一下 什么have down啊 have been down啊 有什么区别 还有当出现when 、sinc

你能不能告诉我一下 什么have down啊 have been down啊 有什么区别 还有当出现when 、sinc down 与have been down的区别 have been down 和 have down 区别是? when you have been turned down went down to & when to 有什么区别 went down have been down 意思 请问一下have been to和have been in和have been at有什么区别? have gone和have been going 有什么区别啊? have与have been有什么区别 could have down除了虚拟语气还有什么用法 could have been 和may have been 有什么区别? have been married 和have got married什么区别啊?