Learn Croatian: Park je iza zgrade. - The park is behind the building.

The preposition iza (behind) requires the noun following it to be in the genitive case. For feminine nouns that end in -a like zgrada, the ending changes to -e in the genitive, making it zgrade.

Is iza one of the prepositions that always takes the genitive case?

Yes! Just like the prepositions you are focusing on in this lesson (kod, do, bez, etc.), iza is a spatial preposition that forces the following noun into the genitive case.

What if the sentence was reversed: 'The building is behind the park'? How would park change?

The word park is a masculine noun ending in a consonant. In the genitive case, these masculine nouns usually add an -a. So, 'behind the park' becomes iza parka, and the full sentence would be Zgrada je iza parka.

Could I put the verb at the end of the sentence, like Park iza zgrade je?

No, because je is an enclitic (a 'weak' word with no spoken accent of its own). Enclitics in Croatian have a strict rule: they must sit in the second position of a sentence or clause. Here, je naturally falls right after the first word, Park.