How do you say have any brother or sisters in french?

There are a few ways to say "have any brothers or sisters" in French, depending on the context and formality:

Formal:

* Avez-vous des frères ou des sœurs? (This is the most formal way to ask.)

Informal:

* Tu as des frères ou des sœurs? (You use "tu" with someone you know well)

* Vous avez des frères ou des sœurs? (You use "vous" with someone you don't know well, or when being polite)

* T'as des frères ou des sœurs? (This is very informal, and not appropriate for formal situations)

You can also use the following expressions:

* Êtes-vous enfant unique? (Are you an only child?)

* Avez-vous des siblings? (This is a more modern and less formal way to say it)

Remember that French grammar can be tricky! Make sure you're using the correct conjugation and word order depending on the context.