Possessive Adjectives - Aggettivi Possessivi

The possessive adjective goes always after the article.

They always agree in gender and number with noun possessed

il mio cane – my dog
la vostra casa – your home
Ii suoi occhi – his/her eyes
Ii loro libri – their books
la nostra amica - our (female) friend
il tuo ragazzo – your boyfriend
le mie scarpe – my shoes

When we talk about relatives we don't need the article:

mia madre – my mother
tuo padre – your father
suo fratello – his/her brother
vostra sorella – your sister
nostro nonno – our grandfather
sua cugina – his/her (female) cousin
mio suocero – my father-in-law

There is an exception for the plural of our relatives;

i suoi fratelli – his/her brothers
le vostre sorelle – your sisters
i nostri nonni – our grandparents
le sue cugine – his/her (female) cousins
i miei suoceri – my parents-in-law

”loro” always wants the article

singular
il loro padre – their father
la loro madre – their mother
il loro fratello – their brother
la loro nipote – their niece
il loro nipote – their nephew

plural
i loro fratelli – their mothers
le loro zie – their aunts
i loro figli – their sons