上古虽无专职判断词,但有各类判断句式,肯定判断句形式至少有以下四类:“百里奚,虞人也。”(《孟子·万章上》)“嫂溺不援,是豺狼也。”(《孟子·离■上》)“克己复礼为仁。”(《论语·颜渊》)“谚曰:‘狼子野心。'是乃狼也,其可畜乎?”(《左传·宣公四年》)可以将上述四类判断句形式分别称为名词判断句、“是”判断句、“为”判断句、“乃”判断句。上古这四类判断句式不一定能互相替换,这说明它们各自有不同的作用,但到中古 Although there is no full-time ancient judge word, but there are all kinds of judgments sentence, affirmative judgment sentence at least the following four categories: “Barry Xi, Yu also.” (“Mencius million chapter)” “(” Mencius away from the top “) ” self-denial rehabilitated benevolence. “(” Analects Yan Yuan “) ” saying: “” (“Zuo Xuan Gong four years”) can be referred to as the above four types of sentence judgments were named verdict, “yes ” judgments, “for ” judgments, “ Is ”judgment sentence. The ancient sentences of these four types of judgment may not be able to replace each other, indicating that they each have different roles, but to the Middle Ages