Questions & Answers about Навичка корисна.
In Ukrainian, the verb to be is usually omitted in the present tense in simple statements like this.
So:
Навичка корисна
literally: Skill useful
natural English: A skill is useful or The skill is useful
This is completely normal Ukrainian, not an incomplete sentence.
Because Ukrainian adjectives must agree with the noun they describe in gender, number, and case.
Навичка is:
- feminine
- singular
- nominative
So the adjective must also be:
- feminine
- singular
- nominative
That gives корисна.
Compare:
- корисний = masculine
- корисна = feminine
- корисне = neuter
- корисні = plural