Formal:
* Você: This is the most common and polite form, used for strangers, people in authority, and anyone you want to show respect to.
Informal:
* Tu: This is the familiar form, used for close friends, family members, and children.
* Você: While this is technically formal, it's also commonly used in informal settings, particularly in Brazil.
Plural:
* Vocês: This is the plural form of "você," used for multiple people.
Example:
* Formal: "Boa tarde, você está bem?" (Good afternoon, are you well?)
* Informal: "Oi, tu como está?" (Hi, how are you?)
It's important to note that the choice of "you" in Portuguese depends on the social context and your relationship with the person you're addressing.