Introduction. Today linguistics more and more looks into the language units of complex nature, which cannot be categorized unequivocally due to the fact that these units combine different realities of the language.Purpose. The purpose of the article is to analyze the functional manifestations of the deverbative noun in a sentence, to determine semantic and grammatical features of sentences of this type.Results. A deverbative noun is the syncretic linguistic unit, which is the result of a verb transited into a noun, the deverbative noun keeps its semantic relations with the original verb and is used to convey an indirect action name.In the structure of the sentence, a verb portrays the same behavior as any of its members, but the predictability of its semantics defines the depth of the sentence content.The study of the deverbative noun syntactic properties in a role of a subject leads to the conclusion that we deal with a qualitatively new subject: it is a causator in causative constructions, an object of evaluation in evaluative constructions, an object of perception in authorized constructions, etc.As the predicate, the deverbative noun may belong to a compound nominative predicate, both as its nominal part and as its modal connector, or deverbative noun acts as a part of a split predicate, while changing the value of the accompanying verb and behaves as the main semantic predicate in a sentence.Observations over monosyllabic sentences with deverbative nouns, prove the inextricable connection with the closest context; the deverbative noun characterizes the surrounding space or introduces the subject of next message.Investigations on how the deverbativ noun functions as an object indicate that this noun is not an implementation of a verb on its word-assosiation ties. The deverbative noun is ruled by semantically incomplete verbs, and thus, there is a mono-credible non-elementary model formed, close in its scope both to semantically elementary verbs and full-length verbs, forming a simple polypropositive sentence with doubled semantic.The analysis of adverbial-modifier functions of the deverbative noun shows a bright semi-predicative character of its prepositional forms. Frequently it behaves as an adverbial-modifier determinant.The semi-predicative nature of the deverbative noun turn is caused by a double functional capacity: on the one hand, the deverbative noun indicates the attribute of its own subject, on the other hand, it performs a certain function in relation to the main predicate. Deverbative noun construction is characterized by synonymy with a subordinate sentence with realized predicativeness.Originality. The realizations of deverbative nouns in the sentence, the predicate of deverbative noun in semantically non-elementary constructions, categorically-syntactic and categorically-lexical meanings of verb-predicates in such constructions, their specifics and purposes are analyzed.Conclusion. The deverbative noun possesses a special status in the system of the noun as a part of the language, as it functions in a sentence differently from substantive nouns, forming other relationships. In any position, the deverbative noun deepens the sentence semantics, introduces additional, «curtailed» propositions, compresses the conveyed information.
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