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CaseSingularPlural
Nominativeименительный · кто? что?курс курсы the subject: who or what acts
Accusativeвинительный · кого? что?курс курсы the direct object of the verb
Genitiveродительный · кого? чего?курса курсов possession, absence, "of"-phrases
Dativeдательный · кому? чему?курсу курсам the receiver: to or for someone
Instrumentalтворительный · кем? чем?курсом курсами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?курсе курсах location and topics: in, at, about

Курс is a masculine noun; the ending pattern above repeats across most masculine nouns, so every table you learn makes the next one cheaper.

Look up any other word in the Russian declension tool, see where курс ranks in the most common Russian words, or start from Russian cases explained if the table above is new territory. More vocabulary lives in Russian words by topic and Russian phrases.

12 forms is a table. Using them is a skill.

Slova drills курс and every word like it with typed case endings, checked letter by letter.

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