1、同位语从句是对主语的进一步诠释，同位语从句的主语只能是有内涵的词语。

2、同位语从句例句：We all cheer up when we heared the news that our team won the first prize.这里的同位语从句是对我们听到的这个新闻的诠释.

3、同位语：I have gotten the message that Tom had won the game.