亚句子指的是小于句子的能够独立使用的语言单位。在国外,有人把这一现象叫做sentence fragments,或者subsentence,或者nonsentence。本文通过介绍Robert Stainton对此现象的研究,总结了亚句子的语用特点,讨论了亚句子与省略的不同、亚句子的理解过程以及亚句子完成的言语行为类型。本文作者就Robert Stainton的研究做了简单评述,指出了其研究的不足,并对今后的相关研究提出了几点建议。 Sentences refer to language units that can be used independently of sentences. Abroad, some people refer to this phenomenon as sentence fragments, or subsentences, or nonsentences. By introducing Robert Stainton’s research on this phenomenon, this paper summarizes the pragmatic features of sub sentences, discusses the difference between sub sentences and omissions, the understanding process of sub sentences and the types of speech actions performed by sub sentences. The author makes a brief comment on Robert Stainton’s research, points out the shortcomings of his research, and puts forward some suggestions on the related research in the future.