Questions & Answers about Ovo je dobra ideja.
Word by word:
- Ovo = this
- je = is
- dobra = good
- ideja = idea
So the structure is very close to English: This is a good idea.
Because dobra has to agree with ideja.
In Serbian, adjectives change form to match the noun’s:
- gender
- number
- case
The noun ideja is:
- feminine
- singular
- here in the nominative
So dobar becomes dobra to match it.
Compare:
- dobar čovek = a good man
- dobra ideja = a good idea
- dobro pitanje = a good question
Ideja is feminine.
A very common pattern in Serbian is that nouns ending in -a are feminine. That is not true in every single case, but it is a strong and useful rule for beginners.
So:
- ideja → feminine
- therefore dobra ideja, not dobar ideja