题目内容：

求助这个英语句子的单词用法
They listened to the videos as students from other cities shared their stories of how their reckless driving affected not only their lives but also those of their passengers.
请问为什么文中的shared是用ed的形式呢 可以用ing的形式吗?因为ing是表示他们是动作的发出者额.个人认为ed是已完成的了~

优质解答

as是连词,后接一个从句,该从句主语是students from other cities,shared在这里是该从句的谓语动词.as根据语境来理解,要看上下文了,在这里不是“因为”就是 “当.的时候”