Relations of logical and linguistic categories in parts of speech, notion of categorical meaning, general and specific linguistic categories and logical categories are discussed in this article. Comparative-typological study of nominative and expressive categories is given. Specific categories for each layer of a language are proven. Except the comprehensively studied morphological category, other categories are greatly paid attention. Some opinions about the nature of categories that originated on the basis of substance and accident are taken into consideration. And a little information is given about the importance of the categories of quality and quantity.

Keywords : category of parts of speech, logical and linguistic categories, category of possessiveness, category of parts of a sentence, category of predicate, category of quantity, category of quality, nominative category, substance accident.