vostro

Use vostro when you are talking to more than one person, and you want to refer to something that belongs to them. It means 'your' in the plural sense.

Example: Questo è il vostro libro. (This is your book.)

Yes, vostro always refers to something belonging to multiple people ('your' plural). However, like other Italian adjectives, it changes its ending to agree with the noun it modifies in gender and number. So, you can have vostro (masculine singular), vostra (feminine singular), vostri (masculine plural), and vostre (feminine plural).

The main difference is the number of people you are addressing. Tuo (and its forms tua, tuoi, tue) is used when you are talking to one person (singular 'your'). Vostro (and its forms vostra, vostri, vostre) is used when you are talking to more than one person (plural 'your').

Yes, absolutely. Like all Italian adjectives, vostro must agree in gender and number with the noun it modifies.

Examples:
il vostro cane (your dog - masculine singular)
la vostra casa (your house - feminine singular)
i vostri amici (your friends - masculine plural)
le vostre idee (your ideas - feminine plural)

When you use Vostro with a capital 'V', it's the formal plural 'your', used when addressing a group of people formally (like 'Lei' for singular formal). However, in modern Italian, this formal plural is often replaced by simply using the standard vostro.

Yes, you can use vostro as a pronoun, meaning 'yours' (plural). In this case, it's often preceded by a definite article.

Example: Quale libro è il vostro? (Which book is yours?)

Vostro means 'your' (plural), referring to something belonging to the people you are addressing. Loro means 'their', referring to something belonging to a third group of people you are talking about, not to.

Yes, some common phrases include:
a vostro piacimento (at your convenience/discretion)
con i vostri occhi (with your own eyes)
nel vostro interesse (in your interest)

Generally, possessive adjectives like vostro come before the noun they modify, and are almost always preceded by a definite article (il, la, i, le).

Example: il vostro pranzo (your lunch)

When referring to a group of mixed gender, the masculine plural form is used. So, if you're talking about a group of friends (male and female), you'd use i vostri amici.