Questions & Answers about Voda je dobra.
Because voda is a feminine singular noun, and the adjective has to agree with it in gender and number.
- masculine: dobar
- feminine: dobra
- neuter: dobro
So:
- Voda je dobra. = The water is good.
If the noun were masculine, you would use dobar, for example Sok je dobar.
Voda is feminine.
A useful clue is that many Serbian nouns ending in -a are feminine, although there are exceptions. Since voda is feminine, anything describing it must also use feminine forms, such as dobra.
Je is the 3rd person singular form of the verb biti (to be).
So in this sentence:
- voda = water
- je = is
- dobra = good
Together: Voda je dobra. = The water is good.