“为 N所 V”,语法学者基本上持两种意见 ,或认为它是被动句式的标志 ,或认为它是动词“为”+定语 +名词性的“所”字结构。笔者立足于历时的角度 ,认为“为”与“所”一开始的结合比较松散 ,存在着由实词义向被动句式标志转化的一个过渡阶段 ,最终“为 N所 V”没有保留最初的实词义“为”与“所”字结构的简单相加 ,从表被动的方向发展下去 ,成为被动句式中的一种形式。 Grammatologists basically hold two kinds of opinions, or consider it to be a sign of passive sentence form or think of it as the structure of the “所” of the verb “+” + attributive + nominal. Based on the diachronic perspective, the author thinks that there is a loose transition from “the beginning” to “the beginning”, and there is a transitional phase from the real meaning to the passive sentence sign. In the end, “N for V” did not retain the original reality The simple addition of word structure of “为” and “所 所” from the passive direction of the form becomes a form of passive sentence structure.