本文以“正”和“每”为例探讨时间范畴向让步范畴的演变。输入端语义的不同,导致输出端语法功能也存在差异,“正”在“正在”义的基础上演变为让步条件连词,“每”在“常常”义的基础上语法化为让步连词,这种演变是基于R原则语用推理导致信息扩展而产生的。 This paper explores the evolvement of the category of concession in time by taking “positive” and “per” as an example. The different semantics of the input end result in the difference of the grammatical function of the output end, and the “positive” evolves into the conditional conjunctive clause of “being” based on the meaning of “often ” The grammaticalization of concession conjunctions, this evolution is based on the principle of pragmatic reasoning led to the expansion of information generated.