Subject Pronouns in Italian / Pronomi personali soggetto
In Italian, subject pronouns (pronomi personali soggetto) are generally omitted since the verb endings (le desinenze) provide for the number and person — in other words, they tell us not only singular and plural but also the subject. However, subject pronouns are typically used when:
When the verb ending is ambiguous, such as with the subjunctive where the singular forms of the verb are identical:
All’università i miei colleghi sono convinti che io sia un somaro.
At university my colleagues are convinced I’m a dunce.
When the subject or subjects need to highlighted or contrasted for emphasis:
Non mi va di uscire! Io sono stanco, ma lei ha sempre la voglia, chiedi a Marina!
I don’t feel like going out. I am tired, but she always feels like it, ask Marina!
When the verb is not stated:
Ragazzi, chi vuole andare al cinema stasera?
Guys, who wants to go to the movies tonight?
I do, mom!
Non posso, mamma! Devo studiare!
I can’t, mom! I have to study!