jesteś

In a sentence

• Jesteś moim przyjacielem.

  You are my friend.

  Here, 'jesteś' means 'you are', used to describe someone's role or relationship (second person singular informal).

• Czy jesteś w domu?

  Are you at home?

  In this instance, 'jesteś' is part of a question and signifies the state of 'being' or presence somewhere, directed at someone.

• Jesteś bardzo utalentowany.

  You are very talented.

  Here, 'jesteś' is used to express a characteristic or quality attributed to the subject.