请告诉我这两个句子所涉及的语法知识

问题描述:

请告诉我这两个句子所涉及的语法知识
1.The teachers came in,following the headmaster.
2.The headmaster came in,followed by many teachers

1.The teachers came in,following the headmaster.现在分词短语作状语,ing形式表示主动,既老师跟在校长之后.2.The headmaster came in,followed by many teachers.过去分词短语作状语,过去分词表被动,及校长被老师...