The article examines the relationship between the grammatical structure of the Tajik and Uzbek languages, it is emphasized that under the influence of the Tajik language, a system of models (structural schemes) of complex sentences was formed in the Uzbek language, in which conjunctions and union words are important, borrowed from Persian and Arabic languages, which function as permanent elements of models (structural schemes) of complex sentences of the Uzbek language. Conjunctions of Tajik-Persian origin in the Uzbek language form models of complex sentences of paratactic and hypotactic nature, functioning as their constant elements, and are divided into coordinating and subordinating. With the help of coordinating conjunctions, models of constructions of complex sentences of a paratactic nature are formed, with the help of subordinate conjunctions, models of constructions of complex sentences of a hypotactic nature are formed. The characteristic feature is that both languages use conjunctions that have both Arabic and purely Iranian origins: yo- "or", yoki - "or", "either-or", khokh - "even though", "let"; ham - "and", ammo - "but", "a"; lekin - "however"; ki - "which", chunki - "because"; to ki - "so that", guyo - "as if"; agar - "if"; gar - "if"
Tajik language, Uzbek language, comparison, grammatical system, system of models (structural schemes), complex sentences
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