Here's why it's tricky:
* Formal: "Vos" is the formal plural form of "your". It's used when addressing multiple people you don't know well or want to show respect.
* Informal: The informal plural of "your" in French is "tes", but this is rarely used. Instead, you'd usually use the singular "ton" or "ta" repeated for each person.
Examples:
* Formal: "Vos projets sont excellents." (Your projects are excellent.)
* Informal: "Tes amis sont sympas." (Your friends are cool.)
Important note: French uses "vous" for both singular and plural "you".