本文基于“一定”的释义,从语形、语义和语用等方面对其进行分析,认为副词“一定”是“一定1”和“一定2”的共用形式:“一定1”相当于情态助动词,强调动作行为在说话后(未然)通过努力才能发生或出现;“一定2”相当于评注性副词,通过某种征兆或迹象对已经发生(已然)或可能出现(或然)的情况的判断或评论。 Based on the definition of “certain”, this article analyzes the aspects of its form, semantics and pragmatics and holds that the adverb “一定” is a common form of “一定 1” and “一定 2”: “一定 1” is equivalent to modal adverb , Emphasizing that the act of acting can occur or appear only through effort after speaking (before it); “Certain 2” is equivalent to the commentative adverb that judges the situation which has occurred (already occurred) or may occur (probable) through some sign or sign Or comment.