Causes and Morphological Prerequisites for Adverbial Transposition of Prepositionless Noun Forms in Russian

This study investigates the phenomenon of transposition of case and number forms of nouns without prepositions into qualitative-determinative and adverbial modifiers. The primary objective of the paper is to identify the linguistic and extralinguistic factors, as well as the morphological basis for the functional and functional-semantic adverbialization of prepositionless nouns. The data for the analysis were extracted from the Russian National Corpus. The research methodology integrates structural-semantic analysis, linguistic experimentation, and oppositional analysis, complemented by elements of distributional and componential analysis. The paper examines the extralinguistic and linguistic factors conditioning the involvement of substantives in adverbial transposition. A distinction is drawn between two types of transposition of prepositionless substantive forms into aspectual-temporal adverbs: the initial stage occurs without violating the identity of the word, remaining within the semantic domain of the source substantive lexeme, followed by a subsequent stage extending beyond its boundaries. The relationship between the grammatical categories and forms of nouns and the process of adverbialization is demonstrated. The analysis identifies morphological subgroups of substantives that exhibit a varying number of adverbialization stages across different forms of a single lexeme.