
Despite the variety of methodological approaches to describing the category of cases, the use of various pedagogical technologies and methods that help to easily present and understand the problem, in the ability to identify cases in words and put the correctness of their endings, causes difficulties even for people who have studied Russian as a native language. An analysis of the semantic and grammatical aspects of word combinations and the history of their study shows that word combinations serve to connect words and give certain meanings to words that form a connection.