I don't know the reason why he was absent yesterday.reason后面是宾语从句么?如果不是,那是什么呢?

问题描述:

I don't know the reason why he was absent yesterday.reason后面是宾语从句么?
如果不是,那是什么呢?

不是宾语从句,是原因状语从句
这句话的意思是我不知道他昨天为什么缺席。

定语从句,why he was absent yesterday用来修饰reason表示...的理由

是定语从句
reason 是先行词
why he was absent yesterday是用来对reason

定语从句,修饰reason