Аннотация:System approach in the study of derivation and morphology in the Slavic languages and the new scientific paradigmElena V. PetrukhinaABSTRACT:The articles referring to the works of A. G. Shirokova considers the actuality of the system and function approaches in modern linguistics, including comparative analysis of Slavic languages. It also discusses possible applications and further development of these approaches with regard to Slavic word formation and the category of aspect. The author shows that it is hardly possible to explain the differences in semantics and use of aspect (as well as other grammar forms) between Russian and Czech without the system approach.