I'm sure of what he said.其中what he said是不是句子?是宾语从句吗?

问题描述:

I'm sure of what he said.其中what he said是不是句子?是宾语从句吗?

是句子,是宾语从句,
因为OF是介词,后面的必然是宾语,而且what he saidwhat 指的是他说的话,是短语