“一”在现代汉语中有一种极重要而常见的用法,即置于谓词性成分前,标示动作、行为、状态的“瞬时量”,表瞬时实现,是瞬时体的标记;瞬时体典型的语法形式是可结句的[一V],不可结句的[一V]是非典型形式;瞬时体并存于词法和句法层面,“一”是个“准形态词”;作为瞬时体的标记,“一”可以和典型的体标记“了”、“着”、“过”共现。 One of the most important and common usage of “a” in modern Chinese is the instantaneous quantity of action, behavior and state before the predicate component. The grammatical form is a knotable [V], and the unjustifiable [V] is an atypical form; the instantaneous body coexists in the lexical and syntactic aspects, and “a” is a “quasi-morphological word”; as a mark of an instantaneous body, One “can be labeled with the typical body”, “”, “” over "co-occurrence.