* Informal: "tu" (used for close friends, family, children, and sometimes people you know well)
* Formal: "vous" (used for strangers, people in authority, or anyone you want to show respect to)
* Formal (plural): "vous" (used when addressing multiple people, regardless of their familiarity)
So, to give you the most accurate translation, I need to know who you are talking to!
For example:
* "You are my friend." --> "Tu es mon ami."
* "You are a kind person." --> "Vous êtes une personne gentille."
* "You all are welcome." --> "Vous êtes tous les bienvenus."