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CaseSingularPlural
Nominativeименительный · кто? что?плохой плохие the subject: who or what acts
Accusativeвинительный · кого? что?плохой (inanimate) / плохого (animate) плохие (inanimate) / плохих (animate) the direct object of the verb
Genitiveродительный · кого? чего?плохого плохих possession, absence, "of"-phrases
Dativeдательный · кому? чему?плохому плохим the receiver: to or for someone
Instrumentalтворительный · кем? чем?плохим плохими the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?плохом плохих location and topics: in, at, about

Плохой is an adjective: it copies the gender, number, and case of its noun. The table shows masculine and plural; feminine and neuter follow the same stem with their own endings.

Look up any other word in the Russian declension tool, see where плохой 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.

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Slova drills плохой and every word like it with typed case endings, checked letter by letter.

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