This article take SOUSHENJI of Jin Dynasty to compare the Buddhist texts in the area of verb LAI/QU . The purpose is to understand its grammatical function in those days and to describe the similarities and dissimilarities in language usage between two materials. This research will provide a better understanding of history and evolution of Chinese language. The early meaning of QU is ‘ to leave; to depart from’, it changed in meaning and to become ‘to go to; to bound for’ later on. Then, it become ‘empty’ gradually in meaning and turn into a ‘function word’. It combine freely with many different verbs in Jin languge. In Buddhist texts of Jin Dynasty, it form a compound word ‘GUOQU’ to express a time concept, to modify the noun behind it. But there are no such usage found in SOUSHENJI. At the ending of this article, we conclude a table to display the grammaticle situation between SOUSHENJI and Buddhist texts of Jin Dynasty.
