when we were having the party,i met him.为什么要过去进行时
问题描述：
when we were having the party,i met him.为什么要过去进行时
答
过去进行时用来描述过去某一时刻正在进行的动作或状态
译文：我们在举行一个晚会的时候,我偶遇了他.