The article reviews syntagmatic research and defines syntagma as psycholinguistic, semantic-syntactic, semantic-intonational, functional unit. It is indicated that lexical mixing and syntactic dismemberment are the result of syntagmatic studies. At the same time, this article gives a definition of the role that syntagma plays in communicative grammar. Syntagma is divided into two broad categories: subjective and objective substances. It is characterized as the main category that defines the model of communicants, reveals the essence of communicative meaning, and reveals the types, form, speech situation and the meaning of the oral and written speech correlation