先秦时期,“是”真正用作系词的例子非常罕见,文章认为该时期系词“是”尚未正式产生,它的确切产生年代是在西汉以后。文章认为,汉语的系词“是”不是典型的动词,所以不能用普通动词的语法化规律来探讨它的产生机制,它所在的初始语法化构式应是[NP_T,是_S+NP_P]式“话题—评述”结构,因为在这样的语境中,指示代词“是”前后联系的都是名词性成分,如果两个名词性成分之间具有“等同”、“归类”等语义关系,这时回指性的“是”就开始向系词“是”演变,这反映了回指性指示代词发展为非动词性系词的普遍规律。 The pre-Qin period, “Yes ” is really used as a cohort example is very rare, the article believes that the period of the word “Yes ” has not yet officially emerged, its exact generation in the Western Han Dynasty. The article holds that the Chinese phrasal “is ” is not a typical verb, so we can not use the ordinary grammaticalization of verbs to explore its production mechanism, where the initial grammaticalization of the structure should be [NP_T, is _S + NP_P] “topic - comment ” structure, because in such a context, the pronoun “is ” before and after the contact are all nominal components, if the two nominal components have “equivalent” , “Class ” and other semantic relations, then back to the “” is the beginning of the “” is the evolution of the word, which reflects the development of non-verbal pronoun pronoun pronoun Universal law.