本文讨论时间词语的形式化表示,提出表示所需的数学模型 Ptij,及四个主要的时间范畴:时段、时序、时态、时体及若干次范畴。各范畴的表示在 ti与与tj 的比较中取值。这一研究的价值是:一、有助于中文时间词语编码加工的研究二、有助于时间词语机器翻译的研究;和三、有助于深化对时间性质的研究。 This article discusses the formalized representation of time words, proposes the mathematical model required to represent Ptij, and four major time categories: Time Period, Timing, Temporal, Temporal, and Several Categories. The representation of each category is taken as a comparison between ti and tj. The value of this research is: First, contribute to the study of Chinese time word coding processing Second, contribute to the study of time word machine translation; Third, help to deepen the study of the nature of time.