本文运用当代逻辑语法的理论和方法,分析转折句的逻辑语法结构,提出给定任意命题p和q,转折句的逻辑结构不应记为合取式p∧q,而是一蕴涵式的否定式,记为瓙(p→瓙q)。在此基础上,本文运用类型逻辑范畴语法为转折联结词建立词条,并同步推导转折句的语形和语义。 In this paper, we use the theory and method of contemporary logic grammar to analyze the logical grammatical structure of turning sentences. We propose that given the arbitrary propositions p and q, the logical structure of the turning sentence should not be written as the conjunctive p∧q, but a negative implication Type, denoted by 瓙 (p → 瓙 q). On this basis, the article uses the category logic category grammar to create terms for the transitional conjunctions, and simultaneously deduces the language shape and semantics of the transitional sentences.