she ws surprised at what he said.为什么what he said,不是what did he say啊

问题描述:

she ws surprised at what he said.为什么what he said,不是what did he say啊
主句有助/情态动词,从句可省?

what he said 是一个宾语从句,意思是“他所说的话”,从句的语序与疑问句相反
what did he say 是一个疑问句,意思是“他说了些什么?”
主句是否有助动词或情态动词,跟从句是否要用没有关系.