полезный (poleznyy) - useful, healthy
Every form of the Russian adjective полезный: 6 cases, singular and plural, stress marked.
| Case | Singular | Plural | |
|---|---|---|---|
| Nominativeименительный · кто? что? | полезный | полезные | the subject: who or what acts |
| Accusativeвинительный · кого? что? | полезный (inanimate) / полезного (animate) | полезные (inanimate) / полезных (animate) | the direct object of the verb |
| Genitiveродительный · кого? чего? | полезного | полезных | possession, absence, "of"-phrases |
| Dativeдательный · кому? чему? | полезному | полезным | the receiver: to or for someone |
| Instrumentalтворительный · кем? чем? | полезным | полезными | the tool or companion: with, by |
| Prepositionalпредложный · о ком? о чём? | полезном | полезных | location and topics: in, at, about |
Полезный 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 полезный 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 полезный and every word like it with typed case endings, checked letter by letter.