what happened to 和 what had happened to的区别是什么?

问题描述:

what happened to 和 what had happened to的区别是什么?

what happened to 是一个一般过去时的问句,后跟的时间状语是类似yesterday等一般过去时的时间状语;而what had happened to是过去完成时,后跟的时间状语是类似before you got to the station等这样的时间状语,就是以...根据语境及上下文