The variability of not only Slavic futural constructions stems from the inefficacity of this tense, which leads to taking a subjective attitude towards the future. This attitude is expressed through a whole range of shades, beginning with a passive desire, expectation, conviction, and ending with decisiveness or a sense of duty. The choice of a specific form of the future tense, and of a specific form of auxiliary word does not reduce any expression of futurity to one kind of modality, which, after all, becomes in a high degree, blurred, but partly affects the attitude of a specific linguistic group towards the past, at least in the period of that tense`s formation.