THE DOCTRINE OF PARTS OF SPEECH IN RUSSIAN GRAMMATICAL SCIENCE

This article is devoted to the analysis of the evolution of the doctrine of parts of speech in Russian linguistic tradition. The author traces the history of the development of this doctrine from Old Russian grammars to modern research, identifying key stages and turning points in its formation. Special attention is paid to modern discussions regarding the foundations of classification of parts of speech, the problem of boundaries between them, and the place of interjections in the system of the Russian language. A conceptual model describing the parts-of-speech system is proposed, integrating traditional and cognitive approaches.