传统语言学向来以书面语为描写对象，以句子为最大研究单位，因而对“虚”词很少关注。作为虚词的叹词，由于属于口语语法的范畴，且是句子语法结构之外的独立成分，其研究历来受到忽视。近年来，由于言语交际日益受到重视，语言学界已把口语语法研究提上日程。该领域中相对滞? Traditional linguistics has always been to write the language as the description of the object, the sentence as the largest research unit, and therefore “virtual” little attention. As interjection of function words, their research has always been neglected because it belongs to the category of colloquial grammar and is an independent component of sentence grammatical structure. In recent years, due to the increasing attention paid to verbal communication, linguistics has put oral grammar research on the agenda. Relative lag in this area?