vă

In a sentence

• Vă rog să-mi spuneți cum să ajung la gară.

  Please tell me how to get to the train station.

  Here 'vă' is a polite or formal way to address someone directly in the second person plural or formally in the singular, used here as the direct object in a polite request.

• Vă gândiți la concediul de vară?

  Are you thinking about the summer vacation?

  'Vă' acts as the reflexive pronoun for the second person plural or formal singular, in this case indicating that the action of thinking is applied to the subject themselves.

• Profesorul vă explică lecția nouă.

  The teacher is explaining the new lesson to you.

  In this sentence, 'vă' functions as an indirect object pronoun for the second person plural or formal singular, indicating to whom the teacher is explaining the lesson.