Word came that he had been abroad 是什么从句?先行词是谁?

Word came that he had been abroad 是什么从句?先行词是谁?
Word came that he had been abroad 是什么从句?先行词是谁?

Word came that he had been abroad 是什么从句?先行词是谁?
是同位语从句. 主语是word(在这里“消息”的意思,相当于news). 而后面的that he had been abroad是word的同位语. came是谓语动词. 位置这样放是为了避免头重脚轻. 其实它本来的面目是：Word that he had been abroad came. 因为它不是定语从句,所以没有先行词之说.

主语从句，先行词是word.