Questions & Answers about Ovo pravilo je važno.
Ovo means this.
It is the neuter singular form of the demonstrative pronoun ovaj / ova / ovo:
- ovaj = this (masculine)
- ova = this (feminine)
- ovo = this (neuter)
It is ovo here because pravilo is a neuter noun.
In Serbian, many nouns ending in -o or -e are neuter.
Pravilo ends in -o, so it is neuter.
That affects the form of words that agree with it, such as:
- ovo pravilo = this rule
- važno pravilo = an important rule
Both ovo and važno are in the neuter singular form to match pravilo.
Je is the 3rd person singular present-tense form of the verb biti (to be).
So:
- Ovo pravilo je važno.
- literally: This rule is important.
In English, is is required, and in standard Serbian it is also required here.