Mrs White walked into the house,followed by her children.

Mrs White walked into the house,followed by her children.
为什么follow是用过去分词呢,明明是同一时间发生的啊,干嘛不用现在分词呢

还原成简单句：等于Mrs White walked into the house,（and she was ）followed by her children.
伴随状语,
动作是由children发出,可以理解为Mrs White是被动的.
如果是Mrs White发出,就是ing形式.
这只是理解的一种方法.这种题目高中很多.多问问老师,归类很重要.