关于系词“是”的产生时代与来源一直是汉语史上争论最多的问题之一。因历史资料的不完全性和误传性以及可控性等诸多原因,学术界难以对其有一个确切而可靠的说法。笔者试图将前人的研究成果做一个综述,并给出自己对该问题的认识,力图使该问题更加明晰。 One of the most debated issues in the history of Chinese has always been the era and source of the production of the co-word “yes ”. Due to the incompleteness and misrepresentation of historical data and its controllability, it is difficult for academics to have an exact and reliable statement about it. The author tries to make a summary of the research results of his predecessors, and gives his own understanding of the problem in an attempt to make the problem more clear.