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CaseSingularPlural
Nominativeименительный · кто? что?урок уроки the subject: who or what acts
Accusativeвинительный · кого? что?урок уроки the direct object of the verb
Genitiveродительный · кого? чего?урока уроков possession, absence, "of"-phrases
Dativeдательный · кому? чему?уроку урокам the receiver: to or for someone
Instrumentalтворительный · кем? чем?уроком уроками the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?уроке уроках location and topics: in, at, about

Урок 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 урок 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 урок and every word like it with typed case endings, checked letter by letter.

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