怎么判断主语从句和同位语从句

问题描述:

怎么判断主语从句和同位语从句
我倒觉得同位语从句和定语从句很容易分,可我却对主语从句和同位语从句分不清,请大家教教我怎么分,谢谢.
1.The news that the plane would take off on time made ue happy.
that the plane would take off on time
是什么从句?应该是同位语吧,但又觉得made为谓语,前面的好像又可看成主语一样?
2.The suggestion that students should learn something practical is worth considering.

1.The news是主语,that the plane would take off on time是同位语.同位语,顾名思义,就是和被它修饰的词在位置上是相同的,是对被修饰词内容,身份等的补充说明.
2.The suggestion is worth considering.
students should learn something practical 这是同位语,说明建议的内容.