When talking,they sat face to face with each other.起中后when为什么用talkingwhen talking,这是怎么一个用法?talking在这里是什么成分?
问题描述：
When talking,they sat face to face with each other.起中后when为什么用talking
when talking,这是怎么一个用法?talking在这里是什么成分?
答
叫独立主格。完整形式是：when they were talking,they sat face to face with each other.
答
这是省略句，应该是一个状语从句
完整形式：When they are talking,they sat face to face with each other.
talking就是现在分词表示状态
答
when引导的时间状语从句中 如果主语和主句一样且谓语动词为be时 就可以省略从句成分 如原句可以是When (they are) talking,they sat face to face with each other
答
是过去进行时吧