Abstract
The article presents a subjective new view of the author regarding the grammatical nature of auxiliary words, which are presented in textbooks and studies in Kazakh linguistics as declension interjections. To do this, the content of the concept of declension was first clarified. The essence of the declension in the Kazakh language is to connect the word in the subordinate part of the phrase with the word in the main part with the designation of its syntactic function by means of declension persons. Therefore, the article considered declension interjections as a separate word in the composition of a subordinate clause and analytical formants consisting of a preposition and an auxiliary word as an indicator of the analytical approach of the category of declension, their functions were analyzed in terms of connecting a word and a word in conjunction and establishing syntactic relationships between words. As a result, it was found that some auxiliary words, which are classified as declension interjections, do not participate in the middle of the syntactic connection between the word and the word and in the establishment of the syntactic function of the subordinate word. The study used methods of comparison, description, interpretation. The results of the study can be used in the disciplines «morphology of the modern Kazakh language», «syntax of simple sentences and phrases of the modern Kazakh language», taught in higher educational institutions. The article is intended for philologists and applicants, as well as for the general public who are interested in the grammatical system of the Kazakh language.