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CaseSingularPlural
Nominativeименительный · кто? что?тетрадь тетради the subject: who or what acts
Accusativeвинительный · кого? что?тетрадь тетради the direct object of the verb
Genitiveродительный · кого? чего?тетради тетрадей possession, absence, "of"-phrases
Dativeдательный · кому? чему?тетради тетрадям the receiver: to or for someone
Instrumentalтворительный · кем? чем?тетрадью тетрадями the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?тетради тетрадях location and topics: in, at, about

Тетрадь 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 тетрадь 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 тетрадь and every word like it with typed case endings, checked letter by letter.

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