Passato Prossimo vs Imperfetto

In brief

Choose passato prossimo for a completed past event and imperfetto for what was happening, what things were like, or what used to happen. Both can describe the same time: the imperfetto sets the scene, while the passato prossimo tells you what happened next. The choice depends on how you present the action, not simply on when it took place.

Form

Use the passato prossimo for a completed event; use the imperfetto for an ongoing or repeated past situation. With mentre (while), an ongoing action often provides the background for a completed event.

Usage

• Use passato prossimo to report a finished event: an arrival, a call, or a purchase.
• Use imperfetto to describe past weather, feelings, habits, or an action in progress.
• Combine them when a completed event interrupts an ongoing situation.

Examples

• Ieri ho comprato un libro. — Yesterday I bought a book.
• Da bambino andavo spesso al mare. — As a child, I often went to the beach.
• Mentre cucinavo, è arrivata Sara. — While I was cooking, Sara arrived.
• Pioveva quando siamo usciti. — It was raining when we went out.

Common mistake

❌ Da bambino sono andato al mare ogni estate.

✅ Da bambino andavo al mare ogni estate.

For a repeated childhood habit, use the imperfetto (andavo) rather than the passato prossimo (sono andato).

Remember

Ask whether you are telling what happened or describing what was going on.