Breakdown of Slika je na zidu.
biti
to be (sam, si, je)
slika
picture
na
on, at / to, onto (with motion) / about (thinking about)
zid
wall
Questions & Answers about Slika je na zidu.
Why is the word for wall zidu instead of zid?
The preposition na (on) tells us where something is located, which means the noun following it needs to be in the locative case. For masculine nouns like zid (wall), you create the locative case by adding -u to the end, making it zidu.
How do I know whether to use na or u for location?
As a general rule, use na for surfaces (like on a wall, table, or floor) and open spaces. Use u for enclosed, 3D spaces (like inside a room or a box). Because the picture is resting on the flat surface of the wall, we use na.
Why doesn't slika change its ending in this sentence?
slika (picture) is the subject of the sentence—it is the thing that is on the wall. The subject always stays in the nominative case, which is the basic dictionary form of the word, so it doesn't get a special ending.
Why is the verb je right after slika? Could I put it at the end?
In Croatian, the short form of the verb to be (je) is a weak word called an enclitic. Enclitics almost always want to be in the second position in a sentence. Therefore, Slika je na zidu sounds perfectly natural, while putting je at the very end would sound incorrect.