“在”字一直处于不断的虚化过程中,经历了动词,介词,语气词等演变阶段。前人大都是把“在”作为一个独立的单音节词进行研究,而通过观察我们发现现代汉语中存在着大量的含有“在”的双音节词,本文主要是针对“在+n”这种形式对“在”的进一步语法化现象进行分析和推测。 “In ” has been in the process of continuous virtualization, experiencing the evolutionary stages of verbs, prepositions, mood words. Most of our predecessors studied “in ” as an independent monosyllable word. Through observation, we found that there are a large number of disyllabic words containing “in ” in modern Chinese. This article mainly focuses on “ + n ”This form analyzes and speculates on the further grammaticalization of “ at ”.