Serbian cases explained: what the seven cases do and how to learn them

What a case is

English tells you who did what to whom by word order. The dog bites the man and the man bites the dog use the same four words, and only their position tells the two stories apart. Serbian does the same job with the ending of the noun. Pas grize čoveka and Čoveka grize pas both mean that the dog bites the man, because čoveka carries the ending of the object whatever its position in the sentence.

A case is that ending, together with the job it marks. Serbian has seven of them, each noun has a form for every case in the singular and the plural, and the adjectives attached to a noun change with it. That is the whole idea. It is not complicated; it is just a lot of endings, and the endings are learned by using them, not by reading about them.

English keeps a trace of the system in its pronouns. He is a subject, him an object, his a possessor: three cases, one word. Serbian does that with every noun.

The seven cases, one job each

Each case has one core job and a set of prepositions that demand it. The core job is what to learn first.

Nominative: the subject. The dictionary form, the one that does the action or is being described. Grad je velik. The city is big.

Accusative: the direct object, and motion towards. The thing the action lands on. Vidim grad. I see the city. After u and na it means going somewhere: Idem u grad, I am going to the city.

Genitive: of, from, and none of. Possession, origin and quantity, and the case of most prepositions. Centar grada, the centre of the city; daleko od grada, far from the city; nema grada, there is no city.

Dative: to whom. The recipient. Pišem bratu, I am writing to my brother. It also goes with a few verbs and the preposition k, towards.

Vocative: calling someone. The form you use to address a person. Marko and Ana stay as they are, but brat becomes brate, gospodin becomes gospodine and Milica becomes Milice. English has no equivalent. You will hear it every day and use it as soon as you have a friend.

Instrumental: with, by means of. Company and tools. Sa bratom, with my brother; vozom, by train; pišem olovkom, I write with a pencil.

Locative: where. Location after u and na, and the topic after o. Marko je u gradu, Marko is in the city; o gradu, about the city. Its endings are the same as the dative's, which is why some grammars count six cases rather than seven.

The pair that trips English speakers most is accusative against locative after the same preposition. U grad is direction, u gradu is location. Going into the city and being in the city take the same u and a different ending.

The endings

The endings depend on the gender of the noun, and gender is almost always visible in the nominative: a consonant means masculine, -a feminine, -o or -e neuter. Learn the three tables below and you have the singular of nearly every noun in the language.

A few things to notice. The masculine accusative is the nominative for things and the genitive for living beings, so vidim grad but vidim brata. The feminine paradigm is the most regular of the three. The neuter accusative always equals the nominative. Dative and locative are always identical. And the plural is a second, smaller set of tables that reuses most of the same logic.

How to learn them without drowning

One case at a time, in this order. Nominative first, because it is free. Accusative second, because every transitive sentence needs it. Then genitive, which most prepositions want. Then locative, because you have to say where things are. Dative, instrumental and vocative come last and take less time than you fear, because by then the habit of choosing an ending exists.

Learn the preposition with the case. Od takes the genitive, sa the instrumental, u the locative or the accusative depending on motion. A preposition without its case is half a word.

Learn the whole noun. Learning grad as "city" is learning a fifth of the word. The dictionary form is one cell of a table, and the other cells are what you will actually say. A word is known when you can produce its forms, not when you recognise its nominative.

Produce, do not review. Nobody has learned the cases from the tables. They are learned by writing sentences, being told the ending is wrong, and writing them again. The table is a reference for when the correction does not make sense; the sentences are the study. A few hundred corrected sentences per case is the honest price, and it is paid in months, not years.

Accept a year of mistakes. Fluent learners still slip on the instrumental plural. The cases stop being a conscious effort somewhere past the first year of regular practice, and until then getting them wrong is not a sign of failure. It is the method working.