The dog entered the room,following his master.following是伴随状语,我想问,是不是伴随状语

问题描述:

The dog entered the room,following his master.following是伴随状语,我想问,是不是伴随状语
和主语从句之间,必须有逗号,这样可以吗,The dog entered the room following his master.

可以没有,但是最好有.没有也不算语法错误.但是因为前后关系不是很紧凑,加上逗号好一些.