Questions & Answers about Košulja koja je u ormaru je skupa, a jakna je na polici.
Koja means which or that here, and it refers back to košulja.
So:
- košulja = a feminine singular noun
- koja = the feminine singular form of the relative pronoun koji
In other words, koja je u ormaru means which is in the closet / that is in the closet.
A very useful pattern is:
- muški rod: koji
- ženski rod: koja
- srednji rod: koje
Because košulja is feminine, Serbian uses koja.
Because there are really two separate clauses, and each one needs its own is:
- koja je u ormaru = which is in the closet
- košulja ... je skupa = the shirt ... is expensive
So the sentence structure is:
- Košulja
- koja je u ormaru
- je skupa
This is completely normal in Serbian. English does the same thing:
- The shirt that is in the closet is expensive
You also have one more je later: