The proposed grammar description is intended for anyone interested in the Polish language. Without pretending to be complete or scientific, it will help those who want to understand the general “picture” of the Polish language, compare it with Russian, systematize knowledge or eliminate gaps in it, remember something forgotten or understand what seems difficult. The book discusses the main morphological categories taking into account the proximity of the Russian and Polish languages, with the main emphasis being on what is important, what is difficult, and what is “wrong”. Almost all the material is presented in tables, to which concise explanations are given. Each grammar section is accompanied by test tasks; keys are given at the end of the book