Question

reason 后 同位语从句和定语从句的区别

Answer 1

reason后的同位语从句只能由that引导，而定语从句可以由that、which、why等引导。

从句由that引导时，that在同位语从句中不作成分，从句本身结构即是完整的；而that在定语从句中作名词性成分如主语、宾语、表语。

Answer 2

reason that ... 同位语从句是  解释说明“reason”的内容，可以翻译成“原因是……”

比如： The reason that he was alergic to alcohol couldn't convince the lawyer.

他对酒精过敏这一理由不足以让律师信服

就是一个同位语从句的例子，而下面再看一个定语从句的例子：

The reason (that) he told us was not true.

他告诉我们的理由不是真的

I don't know the reason why she hates me.

我不知道她为什么恨我

Give me a reason which could satisfy my curiosity.

给我个理由来满足我的好奇心吧

可见定语从句的作用  是修饰reason的，可以翻译成“……的”原因

Answer 3

The reason why I...is that....
why后面是定语 that后面是reason的同位语