This article reveals the problem of teaching prepositions of the Russian language in foreign language groups. In particular, about the frequent use of function words in Russian speech and the correct use of prepositions in phrases, and the fact that some prepositions are valence, which leads to noticeable difficulties in mastering this material by the audience. Examples of constructions with the prepositions “in”, “on”, “from/with” and their ambiguous use are presented.