00964nas a2200121   4500008004100000245013500041210012500176300001200301490000600313520043800319100002900757856005600786       1981                        eng d00aОснова и флексия в индоевропейската и праславянската глаголна система0 aОснова и флексия в индоевропейската и праславянската глаголна си  a14–180 v63 aDue 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.1 aРиков, Георги  uhttp://www.scripta-bulgarica.eu/bg/biblio/rikov1981