Проблемы теоретического описания русского вида как словоизменительной категории: реальные и мнимые

In response to Viktor Chrakovskij (2015; 2018), this paper contributes to the discussion about the theoretical model of Russian verbal aspect, i.e. whether it should be considered an inflectional or derivational (classifying) category. Inter alia, the regularity of secondary imperfectivation as a specific (and unique) morphological mechanism of aspectual derivation is verified based on the example of prefixal Russian verbs with the prefixes pro- and u- found in the Russian National Corpus and on the Russian-language Internet, using Yandex and Google search engines. In addition, I discuss the phenomenon of lexicalization (degrammaticalization) as a possible constraint on standard secondary imperfectivation of Russian verbs and offer arguments to refute the criticism of the inflectional model of Russian aspect. [ABSTRACT FROM AUTHOR]