Question

关于同位语从句的问题eg.The reason why he was chosen remains unknown.这句？

Answer 1

什么同位语从句还是什么其它的从句搞清楚了对学英语没什么实际上的用处.这两句这样理解一下就通了
The reason remains unknown
the reasons were many and various.
中间的在分析句子结构的时候都可以省略.why什么的都是修饰reason/reasons的.,1,同位语从句修饰他前面的抽象名词，在句2中 reasons就是抽象名词，以way引导的同位语从句修饰reasons,2,还是同位语从句。
the reasons were many and various.理由是各种各样的，
why he decided to quit his job ,同位语，阐释reasons是他决定辞去工作的reasons.,1,关于同位语从句的问题
eg.The reason why he was chosen remains unknown.这句显然是同位语从句
eg.The reasons why he decided to quit his job were many and various.这句同上面结构是一样的,但是我怎么从语意上就无法把它作为同位语从句来理解呢?难道是关系副词引导的定从?
我不理解q1240534250同学的说法，在于第一句“The reason why he was chosen remains unknown”实为定语从句，那么修饰抽象名词就不是同位语的专利了，
我之所以对这个句子疑惑，在于一般同位语从句一般都与抽象名词同位，一般没有复数形式。但第二句偏偏给了我一巴掌。虽然我也知道reasons和why在句子中不作成分，可是无法从语意上把它们区别开，