Possessive Adjectives

Possessive adjectives in Italian — words like "my," "your," "his/her" — work differently from English in two important ways: they must agree with the noun they modify (not the owner), and they are almost always preceded by the definite article. This lesson covers all the forms, the article rule, and the important family exception.

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The Complete Table

Italian possessive adjectives have four forms each (masculine/feminine, singular/plural) and agree with the thing possessed, not the possessor:

English	Masc. Sing.	Fem. Sing.	Masc. Pl.	Fem. Pl.
my	il mio	la mia	i miei	le mie
your (informal)	il tuo	la tua	i tuoi	le tue
his/her/its/your (formal)	il suo	la sua	i suoi	le sue
our	il nostro	la nostra	i nostri	le nostre
your (plural)	il vostro	la vostra	i vostri	le vostre
their	il loro	la loro	i loro	le loro

Key Point: "Loro" is invariable — it never changes form. Only the article changes: il loro, la loro, i loro, le loro.

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Agreement: With the Noun, Not the Owner

This is a crucial difference from English. In English, "his book" and "her book" change based on who owns the book. In Italian, the possessive agrees with what is owned:

Marco ha una macchina. → La sua macchina è rossa.
(Marco has a car. His car is red.)
  "sua" is feminine because "macchina" is feminine — not because Marco is male.

Maria ha un cane. → Il suo cane è grande.
(Maria has a dog. Her dog is big.)
  "suo" is masculine because "cane" is masculine — not because Maria is female.

Owner	Possession	Italian	Why
Marco (m.)	macchina (f.)	la sua macchina	Agrees with macchina (fem.)
Marco (m.)	libro (m.)	il suo libro	Agrees with libro (masc.)
Maria (f.)	macchina (f.)	la sua macchina	Agrees with macchina (fem.)
Maria (f.)	libro (m.)	il suo libro	Agrees with libro (masc.)

Tip: This means "il suo libro" can mean "his book," "her book," or "your book" (formal). Context tells you which.

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The Article Rule

In Italian, possessive adjectives are almost always accompanied by the definite article (il, la, i, le, l'):

Italian	English
Il mio libro è sul tavolo.	My book is on the table.
La tua borsa è bella.	Your bag is beautiful.
I nostri amici arrivano domani.	Our friends arrive tomorrow.
Le sue scarpe sono nuove.	His/her shoes are new.

This is very different from English, which never uses "the" with possessives. Think of it as saying "the my book" — strange in English but required in Italian.

With Prepositions

When a preposition comes before the possessive, it combines with the article as usual:

Italian	English
Nella mia casa	In my house
Del tuo amico	Of your friend
Sui nostri libri	On our books
Alla sua festa	At his/her party

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The Family Exception

The most important exception to the article rule involves family members in the singular. When you use a possessive adjective with a singular, unmodified family noun, you drop the article:

With Article (Rule)	Without Article (Exception)
il mio amico (my friend)	mio padre (my father)
la mia amica (my friend)	mia madre (my mother)
il nostro insegnante (our teacher)	nostro fratello (our brother)

Common family nouns that follow this exception: