Possessive adjectives and family vocabulary
Italian possessives are unusual: they almost always come with the definite article. il mio libro = my book (literally 'the my book'). They agree in gender and number with what's owned, not with the owner — il mio amico vs la mia amica. There's one big exception: single, unmodified family members drop the article. Mia madre, NOT la mia madre. Plural family members or any with an adjective bring the article back.
The full possessive table
il mio / la mia / i miei / le mie = my. il tuo / la tua / i tuoi / le tue = your (informal). il suo / la sua / i suoi / le sue = his / her / your (formal — capital S in writing). il nostro / la nostra / i nostri / le nostre = our. il vostro / la vostra / i vostri / le vostre = your (plural). il loro / la loro / i loro / le loro = their — note that loro itself never changes; only the article does. Each form picks its slot from gender and number of the noun owned.
Article + possessive + noun
Italian almost always wants the article: il mio gatto (my cat), la mia casa (my house), i miei libri (my books), le mie amiche (my female friends). English drops the article ('my house'), Italian keeps it. With bello or any other adjective, the order is article + possessive + adjective + noun: la mia bella casa = my beautiful house.
Suo: his, her, AND your-formal
Just like in lesson 4, suo doesn't tell you whose. il suo libro can mean 'his book', 'her book', or formal 'your book' — you read it from context. The form agrees with the BOOK, not the owner: il suo libro stays masculine whether the owner is a man or woman, because libro is masculine. la sua casa is feminine because casa is feminine — not because the owner is.
The family exception: no article
With single, unmodified family members, drop the article. Mia madre = my mother. Tuo padre = your father. Suo fratello = his/her brother. Mia sorella = my sister. Nostro figlio = our son. The exception applies to: madre, padre, fratello, sorella, figlio, figlia, marito, moglie, zio, zia, nonno, nonna, cugino, cugina — most close-family words. But loro is special: il loro fratello (with article) — loro always keeps the article.
When the article comes back
Three situations bring the article back even with family. (1) Plurals: i miei fratelli = my brothers (not miei fratelli). (2) An adjective: il mio fratello piccolo = my little brother. (3) Diminutives or affectionate forms: la mia mamma, il mio papà — the cute version pulls the article back. Also note: mamma, papà, nonno, and nonna are borderline; both with and without article are heard. With formal madre, padre, figlio etc., follow the rule strictly.
