The accusative case (the direct object) + animacy
The accusative marks the direct object — the thing the action happens to. Feminine -a nouns change -a → -u (žena → ženu). Neuter nouns and inanimate masculine nouns look exactly like the nominative; but animate masculine nouns (people, animals) take the genitive-style ending (-a).
Primeri
- Pijem kafu. I am drinking coffee.
- Vidim grad. I see the city.
- Vidim brata. I see my brother.
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Sve iz videa, u tekstu.
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You can have every word right and still be wrong. Say 'I see my brother' the obvious way in Serbian, and a native speaker hears a mistake. The accusative case is why.
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The accusative marks the direct object — the thing the action happens to. In 'I drink coffee', coffee is what gets drunk. In 'I see the city', the city is what gets seen. That target word goes into the accusative.
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It's the workhorse object case — almost every sentence with a verb and an object needs it. So how does a noun change to show it's the object? That depends on the noun.
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Start with the easy one. Feminine nouns ending in -a swap that -a for -u. Coffee, kafa, becomes kafu. One clean, reliable change.
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Here it is in a real sentence. 'I'm drinking coffee.' Kafa is the dictionary form, but as the object it becomes kafu. Pijem kafu.
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Same pattern every time. 'I'm reading a book.' Knjiga becomes knjigu. If it's feminine and ends in -a, the object form ends in -u. Čitam knjigu.
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Now masculine and neuter nouns — and here's the good news. Neuter nouns, and masculine nouns that are things, don't change at all. The accusative looks exactly like the dictionary form.
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'I see the city.' Grad is masculine, and a city is a thing — inanimate. So grad stays grad. Nothing to add, nothing to change. Vidim grad.
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But here's the twist that trips everyone up. If a masculine noun is alive — a person or an animal — it does change. Animate masculine nouns add an -a. This is the animacy split, and it's the heart of the rule.
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Watch it happen. 'I see my brother.' Brat is masculine and a brother is a person — animate. So brat becomes brata. That extra -a is the whole difference. Vidim brata.
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Animals count as alive too. 'I have a dog.' Pas is masculine and animate, so it takes the ending — and pas becomes psa. Same logic: it's living, so it changes. Imam psa.
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And this is the classic mistake. Learners leave the animate noun in its dictionary form. 'Vidim brat' feels right — the word is right — but the ending is missing. It has to be 'Vidim brata'. Forget the -a and you sound like a beginner.
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Let's lock it in. The accusative marks the object. Feminine -a turns into -u. Neuter and inanimate masculine nouns don't change. And animate masculine nouns — people and animals — add an -a.