3) 同位语从句
有很多名词后可以跟that引起的从句，说明其内容，可以称作同位语从句。
He referred to Copernicus’s statement that the earth moves round the sun.
有时同位语从句可以和同位的名词分开。 (其实是同位语从句太长后置)
The rumour spread that a new school would be built here.
在少数情况下也可用连接副词(代词)引起的从句作同位语。
He had no idea why she left.
