Questions & Answers about U ovoj rečenici subjekt je izrečen, pa je značenje jasnije.
It is the locative case.
After u, Croatian uses:
- locative when it means in/at a place or setting
- accusative when it means into/to with movement
Here, u ovoj rečenici means in this sentence, so it is locative.
Both words are in the locative singular:
- ova → ovoj
- rečenica → rečenici
So u ovoj rečenici literally means in this sentence.
Because rečenica is a feminine noun, and here it is in the locative singular.
Its basic form is:
- rečenica = sentence
In the locative singular, it becomes:
- rečenici
This is a very common pattern for many feminine nouns ending in -a:
- škola → u školi
- knjiga → u knjizi
- rečenica → u rečenici
So the ending changes because the noun is not in the dictionary form anymore.