Questions & Answers about Ovaj lek je stvarno dobar.
Because lek is a masculine singular noun, and the demonstrative ovaj must agree with it in gender, number, and case.
- ovaj = masculine singular
- ova = feminine singular
- ovo = neuter singular
So with lek, you say ovaj lek.
It is in the nominative singular.
That is because ovaj lek is the subject of the sentence. In Serbian, the subject is normally in the nominative case.
- ovaj = nominative masculine singular
- lek = nominative singular
Je is the 3rd person singular present tense of the verb biti (to be).
So in this sentence, it functions like is in English. Serbian often uses forms of biti in exactly this kind of sentence:
- On je visok. = He is tall.
- Ovaj lek je dobar. = This medicine is good.
Without je, the sentence would sound incomplete in standard Serbian.