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CaseSingularPlural
Nominativeименительный · кто? что?полка полки the subject: who or what acts
Accusativeвинительный · кого? что?полку полки the direct object of the verb
Genitiveродительный · кого? чего?полки полок possession, absence, "of"-phrases
Dativeдательный · кому? чему?полке полкам the receiver: to or for someone
Instrumentalтворительный · кем? чем?полкой полками the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?полке полках location and topics: in, at, about

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

Look up any other word in the Russian declension tool, see where полка 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 полка and every word like it with typed case endings, checked letter by letter.

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