Abstract
The purpose of this article is to determine the semantic and structural characteristics of a compound sentence with the union so/such ...that, due to the correlative nature of the union. The union so/such … that makes the main and subordinate parts of the sentence formally marked, because of which the connection between them becomes closer. The main part contains a pronominal adverb of the degree so or a demonstrative pronoun such. The adverb so is combined with qualitative adjectives, adverbs, verbs, the pronoun such with nouns. The subordinate clause is formed by the union that, which performs two functions: it performs a subordinate connection and correlates the subordinate clause with the correlates so and such. The last function gives grounds to assert that the subordinate clause is not subordinate to the entire main clause, but to the member with which the correlate correlates.