中文摘要：

“宁可p，但q”作为转折复句的一种，联结的小句在逻辑语义上具有目的或非目的关系，后小句在语用上起到前提补充或语势补充的作用。“宁可p，但q”彰显了转折对立，而“宁可p，也q”隐含了条件对立，在对立的逻辑基础上两者具有共性，“但”和“也”可以有条件地替换。这和后小句的句式特征、逻辑语义类型及说话人语用动机的分合有关。

英文摘要：

＂Ningke p,dan q＂is one kind of the transitional sentences. The connected clause has the purpose or non-purpose relations with the matrix clause in logical semantics,and the following clause plays the role of premise or linguistic force complement. This sentence pattern displays a disjunctive oposition,while ＂ningke p,ye q＂harbours conditional oposition. There is universality between the two on the logical base of oppostion. Conditional substitu- tion can be conducted between ＂dan＂ and ＂ye＂.All these involve the syntactic characteris- tics,logical semantic category and the division and connection of the pragmatic motivation from the speaker.