怎样判断是独立主格不很不明?

问题描述:

怎样判断是独立主格不很不明?
Our homework having been finished,we went to play football.改成独立主格结构可以这样改吗?Our homework was finished,we went to play football.这样改对吗为什么?最重要有人能告诉我这样改行不行?

不行.中间是逗号,即是一个句子,只能有一套主谓结构;如将逗号改为分号或用and连接则行