This work was originally conceived as an essay on the grammar of the Yukagir language - a textbook for students of the College of the Peoples of the North, students of the northern department of the philological faculty of Yakutsk State University and pedagogical schools. However, in the process of systematizing the linguistic calculations of V. Johelson and E. Kreinovich, there was a lack of development of some very important grammar issues, fuzziness and uncertainty in the definition of individual linguistic phenomena, as well as an inaccurate interpretation of a number of specific grammatical forms.