本文在回顾学界相关研究的基础上,总结“了2”的句法意义和语法意义;在语用学理论指导下,结合语料,揭示其语用意义。笔者认为,“了2”可以使交际中话语语气缓和,更加具有商榷性和可接受性,减弱言语行为的施事力度,等等。此外,“了2”的使用受语境限制和制约,是顺应环境作出的得体的语言选择。 Based on the review of academic research, this article summarizes the syntactic and grammatical meanings of “2 ”. Under the guidance of pragmatic theory, this paper combines the corpus and reveals its pragmatic meaning. The author believes that “2 ” can ease the tone of communication discourse, more conclusive and acceptable, to reduce the intensity of verbal acts, and so on. In addition, the use of “2 ” is subject to contextual constraints and constraints and is a decent language choice that is responsive to the environment.