what happened what had happened 有什么区别呢

what happened what had happened 有什么区别呢 what had happened和 what has happened有什么区别 What happened和what's happened有什么区别呀? Whatever happened 和 what happened 有什么区别? What had happened?What had happened?What had happened? What happened和What had happened意思 区别?使用的区别,在什么情况下使用? what happen和what happened有什么区别 what happened to you 和what has happened to you有什么区别 what's happened? 和what happened?有什么区别?大神们帮帮忙 what happened 和what has happened 有什么区别么请问 what happened 和 what is happened 到底有什么区别 是不 what is wrong had happened?