In short

The accusative case (Знахі́дний відмі́нок) marks the direct object — the thing or person a verb acts on directly: I am reading a book, She sees a student. It answers the questions кого́? (whom?) and що? (what?).

For most nouns the endings are easy. The one rule an English speaker must burn into memory is the animacy rule for masculine nouns: a masculine noun that names a living being takes the genitive form in the accusative (я ба́чу бра́та), while a masculine noun that names a thing looks exactly like the nominative (я ба́чу стіл).

The rule

Ukrainian marks the direct object by changing the noun’s ending. Which change happens depends on the noun’s gender and — for masculine nouns — on whether it is animate (a person or animal) or inanimate (a thing).

• Feminine nouns in -а / -я: swap the ending for -у / -ю (кни́га → кни́гу, земля́ → зе́млю). This is the most visible change.
• Feminine nouns ending in a consonant or -ь (ніч, сіль): no change, accusative = nominative.
• Neuter nouns: no change, accusative = nominative (вікно́ → вікно́).
• Masculine animate (people, animals): accusative = genitive, i.e. add -а / -я (студе́нт → студе́нта, кіт → кота́).
• Masculine inanimate (things): accusative = nominative, i.e. no change (стіл → стіл, журна́л → журна́л).

The animacy split (the категорія істо́т, “category of living beings”) is what tells бра́та apart from стіл. Ask yourself: does this masculine noun breathe? If yes, borrow the genitive ending; if no, leave it alone.

Forms & patterns

Masculine singular — animacy decides everything

Feminine singular

Note the stress jumping to the front in рука́ → ру́ку and земля́ → зе́млю: the ending changes and the stress moves with it.

Neuter singular — never changes

Plural — animacy governs all three genders

Personal pronouns

Examples

Common mistakes

• Я бачу брат -> Я бачу брата — a masculine animate noun takes the genitive form in the accusative.
• Я бачу стола -> Я бачу стіл — стіл is a thing (inanimate), so its accusative equals the nominative; don’t add -а.
• Я читаю книга -> Я читаю книгу — a feminine noun in -а becomes -у in the accusative.
• Вона любить земля -> Вона любить землю — feminine -я becomes -ю, and the stress shifts (земля́ → зе́млю).
• Я запрошую друг -> Я запрошую друга — друг is animate, so accusative = genitive (add -а).
• Я знаю він -> Я знаю його — a pronoun object must be accusative (він → його), never nominative.

Tips

• Ask кого́? (whom?) or що? (what?) after the verb; the word that answers is your direct object and goes in the accusative.
• The masculine litmus test: is it alive? Animate → borrow the genitive ending (-а / -я). Inanimate → leave it looking like the nominative.
• Feminine nouns are the reliable ones: replace the nominative -а / -я with -у / -ю, and you are done.
• Neuter nouns, and feminine nouns that end in a consonant (ніч, сіль), never change: accusative = nominative.
• Watch the stress leap forward in feminine nouns: рука́ → ру́ку, вода́ → во́ду, нога́ → но́гу.
• The animacy = genitive rule also works in the plural, and there it applies to all genders: я ба́чу студе́нтів, but я ба́чу столи́.
• Memorise the pronoun set (мене́, тебе́, його́, її́, нас, вас, їх) — you will reach for it in almost every sentence.