Subiectul discutiei a deviat si nimeni nu mai stia de unde plecasera.
The subject of the conversation drifted and nobody knew where they had started from.
Filmul are un subiect interesant, dar ritmul e prea lent.
The film has an interesting plot, but the pace is too slow.
La gramatica, subiectul propozitiei face actiunea verbului.
In grammar, the subject of the sentence performs the action of the verb.