由于对“是”的义位判定不同,学者对《尔雅.释言》“是,则也”的释读多有争论,焦点为二者是否同义,在哪个义位上构成同义关系。本文依据“是”、“则”各自的语义引申系统,以出土文献为例证,判定“是”为“法则”义,即“是”、“则”在“法则”义上构成同义关系。 Because of the different righteousness of “yes ”, scholars are more controversial about the explanation of “Ela.” And “yes”, the focus is whether the two are synonymous and in what position Synonymous relationship. This paper bases on the semantic extension system of “yes ” and “then ”, taking the unearthed literature as an example to determine “yes ” as “rule ” meaning, “In the ” law "on the meaning of the formation of a synonymous relationship.