%0 Journal Article %J Съпоставително езикознание / Сопоставительное языкознание / Contrastive linguistics %D 1981 %T Основа и флексия в индоевропейската и праславянската глаголна система %A Риков, Георги %X Due to the appearance of the new imperfective formation *-{\v e}ax- in Proto-Slavonic, the verb system became the basic medium for expressing temporal relations. That is why the old opposition between primary and secondary inflexions became redundant, the result being a partial neutralization of that opposition; cf. the Old Bulgarian inflexions for the third person singular, the first, second and third person plural and the dual. %B Съпоставително езикознание / Сопоставительное языкознание / Contrastive linguistics %V 6 %P 14–18 %G eng