This is the first part of the lesson. The rest, the exercises and the reviews are in the app.
Location vs direction: “where” versus “where to”
Earlier lessons kept putting this off with the same promise: “the whole where / where-to pair comes in the lesson Location vs direction”. This is that lesson. It rests on a single idea: one and the same preposition, u or na, takes two different cases depending on whether you are talking about the place where something is or about movement towards it. u gradu, “in the city” (where? at rest), is the locative case. u grad, “into the city” (where to? motion), is the accusative. One preposition, two forms, two meanings.
You already know both halves separately: the locative with prepositions (u gradu, na poslu) from “Locative prepositions”, and the accusative of direction (u grad, na posao) from “Accusative prepositions (direction)”. Here we put them side by side, so that choosing the case becomes a habit. The key is a question. gde? (where?) calls for the locative; kuda? (where to?) calls for the accusative. English asks both with the same word, where, so this is the one habit to build: before you choose a case, decide which of the two questions you are really answering.
Two pairs of forms: u gradu / u grad, na poslu / na posao
Let’s start with the forms themselves. On the left is rest (locative, “where?”), on the right is motion (accusative, “where to?”). Watch how the same word changes its ending:
Now the endings. Masculine: rest is u gradu (the locative ending -u) → motion is u grad (the bare accusative, the same as the dictionary form). Feminine: rest is u školi (-i) → motion is u školu (the accusative -u). Look closely: in the masculine, -u is the locative (gradu), but in the feminine, -u is the accusative (školu). The same letter, different cases, and you must not mix them up. What saves you is not the shape of the word but the question: gde? or kuda?
The most reliable tool for the choice is the question. Serbian distinguishes “where?” (about a place) from “where to?” (about a direction) with two separate words, and each is tied to its case. In casual speech a Serb will often ask Gde ideš? for “where are you going?” too; the verb of motion still picks the case of the answer: U grad.
In English: “Where are you? In the city.” / “Where are you going? Into the city.” / “Where do you work? At the university.” / “Where are you rushing off to? To the university.”
Cheat sheet
The cheat sheet — everything essential from the lesson on one page. In the app it opens at any time.
Location vs direction: “where” versus “where to”
One preposition, two cases. Location (rest, the question gde?, where?) → locative: u gradu. Direction (movement to a goal, the question kuda?, where to?) → accusative: u grad. The verb is your guide, not the preposition.
Two pairs of forms
Endings: masculine -u = locative (u gradu), bare form = accusative (u grad); feminine -i = locative (u školi), -u = accusative (u školu). Same letter, different cases: the question saves you, not the form.