如何区分同位语从句和定语从句

Question

如题所述

Answer 1

定语从句：能代入
同位语从句：不能代入
举例：
①定语从句
I noticed a phenomenon that was very strange.
先行词phenomenon代入that（that是代词，指代的是phenomenon，所以可以把phenomenon代回that），就变成了A phenomenon was very strange.
②同位语从句
The phenomenon that the economy is declining has become the talk of the country.
试着把phenomenon代回that，变成The phenomenon the economy is declining. 这句话是不对的，所以不能代入。