씨끝 -아와 -고의 역사적 교체

Abstract

This paper tries to discuss the limits of the study of diachronic Korean syntax and to trace the process in which conjunctive ending "- a" was replaced with "ko" within this limits. Two facts contribute to the replacement of '- a' with 'ko' . One is the weaking of the productivity of ending '- a' which result from the historical change of '-a+is-' to '-as-' in middle Korean. The other is the special semantic function of progressive expression '- ko + is- ' to signify the state-duration as well as the action-progress.