本文把命题当作“说话人化”的命题看待 ,对其内部两种基本语义关系“预设意义”和“蕴涵意义”作了对比分析。命题内部的语义关系当然不止这两种 ,但它们在命题语句意思的解读中发挥着重要的作用。文章着重从蕴涵和预设的性质、特征、功能 ,以及它们同逻辑、否定等的关系 ,从其真假值的分布等方面入手 ,对二者的区别作了较为详尽分析 This thesis treats the proposition as the proposition of “speaker-oriented”, and makes a contrastive analysis of the “presupposition” and “implications” of the two basic semantic relations. Of course, there are more than two kinds of semantic relations within propositions, but they play an important role in the interpretation of the meaning of propositions. The article focuses on the nature, features, functions of implication and presupposition, and their relationship with logic and negation, starting with the distribution of their true and false values, etc., and makes a detailed analysis of the differences between the two