如何区分定语从句和同位语从句

关于如何区分定语从句和同位语从句的问题心血管健康网小编在此为大家总结了几种简单、易行的方法希望能够帮助到大家。
1: 句中含有that时看that是否能省略。
定语从句中的that不仅起到连接词的作用而且还充当句子的成分 主语、宾语等往往可以省略。例如：The apples that your mom bought yesterday were delicious. 其中that可以省略。
在同位语从句中that只起到连接词的作用不充当句子成分一般不能省略。例如：It is a fact that he has done his best.
2: that与先行词的关系。
定语从句中that对先行词起到修饰、限定作用。例如：This is the dog that I'm looking for.
同位语从句中that对先行词起到解释、补充说明的作用。例如：The news that he has died was true.
3: 先行词不同。
定语从句中先行词往往是具体的人或者事物。例如：The pen that Tom takes is blue.
同位语从句中先行词往往是抽象性的名词。例如：The news that Tiny will come is true.
4: 引导词不同。
定语从句中当指代人时可以用who或者which来引导而同位语从句不可以。例如：The boy who is laughing is my brother.
同位语从句中引导词可以用howwhatwhether而定语从句不能。例如：I have no idea whether he'll come or not.
5: 同位语从句中从句可以转换为同位名词的表语而定语从句不可以。例如：The fact can't be accepted by his parents that Tom is lost.