When does the past participle change form if conjugated with the verb avere?
If the verb avere is in a compound past tense (passato prossimo/trapassato prossimo) and is preceded by a direct object pronoun (pronome diretto-mi, ti, lo, la, li, le) the verb avere must agree. For examle, Ho visto mia mamma. (I saw my mother). This would become chi l'ha vista? (who saw her?) because the verb avere is preceded by the direct object pronoun la.
CR
Related Italian A Level answers
All answers ▸Che pensi delle cosiddette 'unioni civili', ossia unioni tra persone omosessuali? (Do you approve same-sex marriage?)
How can I translate in Italian: ''In World War I, Italy joined the Entente with France and Britain, despite having been a member of the Triple Alliance with Germany and Austria-Hungary, and gave a fundamental contribution to the victory of the conflict. ?
When should you use the 'imperfetto' and when should you use the 'passato prossimo'?
How do I form the trapassato prossimo (pluperfect) tense in Italian? When do I use it?