Abstract

Variability of language units is the main feature of a language system and its activity. Variability has distinctive features providing processes like coding, decoding, maintaining and transforming the information from one generation to the other. One of the characteristic features of modern linguistics is the identification of invariants in every level of a language system. It helps us to say that an invariant is the factor that provides the unity of elements but a variant distinguishes different steps of this unity. Variability of language units is the main means providing the communicative function of the language, or “the possibility of variability of language units is the characteristic feature of the language nature”, as G. V. Stepanov says. (Stepanov, 1976, p. 223)

Variability is the characteristic feature of the realization of the units of phonological, morphological and syntactic levels of the language in syntagmatics, in other words the units of these levels are represented in variants in the speech act. The study of variability of the sentence intonation can be a great contribution to the development of the variability problem. Our aim is to investigate melodic contour of adverbial clauses of cause and result, the direction of intonation contour, the interval between syntagms and their register.

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