Abstract
The article is devoted to to the mental representation of grammatical structures, namely to the structural analysis analysis of substantive-nominative proposemes that is to the Compound proposemes, composing the main and the subordinate predicative clauses and proposemes-balances, composing two subordinate clauses - subject and predicative. The material for the research are substantive-nominative proposemes taken from the works of British and American writers of the XX century. In the work the definitional analysis, the classification method and the modeling method of structural-functional analysis, the method of linguistic observation, the descriptive and analytical method were used. The results of the research showed that the analyzed proposemes can be treated, first. as the constructions of primary syntactic position which, in the functional plan, are substantive-nominative, secondly, monolithic - on the degree of intensity of connection between their clauses and, thirdly, from a logic-cognitive point of view - monomial, expressing one difficult judgment with the event nature of an objectivization of thought.