Regional aspect of causal conditionality expression research (in linguistic diachrony)

The article gives the definition of function-semantic category of conditionality; presents various viewpoints on both the correlation of its components (purpose, causes, effects, conditions, concessions), and primarily comprehension of the given meanings in the history of language. The conclusion reflects on the dominant position of causality in semantics of conditionality, connected to the situation of written communication and peculiarities of intelligent perception. The presented case can be useful to students and post-graduate students of a Philological Department in the process of studying historic syntactic of the Russian language.