Russian grammar

The purpose of the study is to study the degree to which differential features of nouns in the prepositional case that explicate the periphery stage of parenthetic-modal units and expressions on the transitivity scale match, on the one hand, the differential features of nuclear representatives of nouns, and on the other hand, the features of nuclear representatives of parenthetic-modal units originating from adjectives. It is established that when used as a detached parenthetic-modal component of the utterance, "po sovesti" reaches the periphery zone of parenthetic-modal units. At the same time, the functional modalate that undergoes semantic and grammatical transformations does not disturb the semantic equivalence of the original substantive lexeme. The results of the study can be used when developing the theory of the parts of speech and inter-part-of-speech categories as well as to create the transpositional grammar of the Russian language.