Formal:
* Vous allez - This is the most common and formal way to say "you will."
* Vous aurez - This is used for future actions that are certain or planned.
Informal:
* Tu vas - This is used for "you will" when talking to a single person you know well, like a friend or family member.
* Tu auras - This is used for future actions that are certain or planned when talking to a single person you know well.
Examples:
* Vous allez voir le film ce soir. (You will see the movie tonight.)
* Vous aurez besoin d'un visa pour voyager. (You will need a visa to travel.)
* Tu vas m'aider à déménager? (Will you help me move?)
* Tu auras beaucoup de plaisir à la fête. (You will have a lot of fun at the party.)
It's important to note that the choice between allez and aurez (or vas and auras) depends on the tense of the verb. Allez and vas are used with verbs that are in the future simple tense, while aurez and auras are used with verbs in the future perfect tense.