The full adjective case table

Adjectives follow their noun's case — and the endings are very predictable.

When the noun changes case, the adjective changes with it. The endings follow a small set of patterns. Once you've seen them a few times, you'll predict them.

Masculine and neuter share most endings

Masculine and neuter adjectives have identical forms in the genitive, dative, instrumental, and prepositional. They differ only in the nominative and accusative. - Nominative: новый стол / новое окно - Genitive: нового стола / нового окна - Dative: новому столу / новому окну - Instrumental: новым столом / новым окном - Prepositional: о новом столе / о новом окне

Feminine — one set of endings

- Nominative: новая книга - Accusative: новую книгу - Genitive: новой книги - Dative: новой книге - Instrumental: новой книгой - Prepositional: о новой книге The genitive, dative, instrumental, and prepositional all use -ой / -ей.

Plural — one set

- Nominative: новые столы - Accusative (inanimate): новые столы / (animate): новых студентов - Genitive: новых столов - Dative: новым столам - Instrumental: новыми столами - Prepositional: о новых столах

Soft-stem adjectives (синий)

Same patterns but with soft vowels: - Nom: синий, синяя, синее, синие - Gen (m/n): синего; (f): синей; (pl): синих - The same -его / -ей / -их structure as new — just with 'и' where the hard pattern has 'ы' or 'о'.

Examples

У меня нет нового друга.

I don't have a new friend.

Genitive masculine animate.

Я даю книгу новой подруге.

I'm giving the book to my new (female) friend.

Dative feminine.

Я говорю с новым учителем.

I'm talking with the new teacher.

Instrumental masculine.

Мы говорим о новой книге.

We're talking about the new book.

Prepositional feminine.

У моих хороших друзей всё хорошо.

My good friends are doing well.

Plural genitive of у construction.