Questions & Answers about Pas je iza vrata.
- Pas = the subject, in the nominative singular
- je = is, the 3rd person singular present of biti (to be)
- iza = the preposition behind
- vrata = door, used after iza in the required case
So the structure is basically:
subject + is + prepositional phrase
Because Serbian normally uses the verb biti (to be) in sentences like this.
So just as English says The dog is behind the door, Serbian says Pas je iza vrata.
Unlike some other Slavic languages, Serbian does not normally drop is in the present tense in standard speech. So Pas iza vrata would sound incomplete in ordinary Serbian.
Je is a clitic, which means it usually goes in second position in the clause.
In Pas je iza vrata, the first element is Pas, so je comes right after it.
You can also change the word order, but je still tends to stay in second position: