古代汉语中的“A为N所V”结构,既可是个判断结构,亦可是个被动结构;然而,二者并无渊源关系。二者的语法化既与“为”字虚化为判断动词和被动标记介词有关,也与“所”字虚化为泛义代词衍生出“所V”结构和虚化为焦点标记有关;判断动词“为”与“所V”结构组配生成了判断结构,被动标记介词“为”与焦点标记“所”组配生成了被动结构。 In ancient Chinese, “A is N V ” structure, either a judgment structure, but also a passive structure; However, there is no relationship between the two. The grammaticalization of both is related to the “” “” character as the judgment verb and the passive marker preposition, but also with “Suo ” character into the universal synonym to derive “V ” structure and blur Which is the focus mark. Judging the verb “for ” and “V ” structure group generated the judgment structure, the passive mark preposition “for ” and the focus mark “所 ” generated passive structure.