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CaseSingularPlural
Nominativeименительный · кто? что?бабочка бабочки the subject: who or what acts
Accusativeвинительный · кого? что?бабочку бабочек the direct object of the verb
Genitiveродительный · кого? чего?бабочки бабочек possession, absence, "of"-phrases
Dativeдательный · кому? чему?бабочке бабочкам the receiver: to or for someone
Instrumentalтворительный · кем? чем?бабочкой бабочками the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?бабочке бабочках location and topics: in, at, about

Бабочка 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 бабочка 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 бабочка and every word like it with typed case endings, checked letter by letter.

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