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CaseSingularPlural
Nominativeименительный · кто? что?страна страны the subject: who or what acts
Accusativeвинительный · кого? что?страну страны the direct object of the verb
Genitiveродительный · кого? чего?страны стран possession, absence, "of"-phrases
Dativeдательный · кому? чему?стране странам the receiver: to or for someone
Instrumentalтворительный · кем? чем?страной странами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?стране странах location and topics: in, at, about

Страна 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 страна 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 страна and every word like it with typed case endings, checked letter by letter.

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