Passato Prossimo: Complete Reference

This page is a consolidated reference for the passato prossimo — Italian's everyday past tense for completed events. It pulls together auxiliary choice, participle formation, agreement rules, irregular participles, and the contrast with the imperfetto into a single page you can bookmark and return to. If you want a deeper explanation of any one piece, follow the cross-links; if you want the whole system in one place, you are in the right page.

The passato prossimo is a compound tense: it combines a present-tense auxiliary (avere or essere) with the past participle of the main verb. Ho mangiato — I have eaten / I ate. Sono andato — I have gone / I went. Despite the literal "have" form in ho mangiato, the tense translates as a simple English past in most contexts: it is Italian's standard tense for finished past events.

The basic formula

Passato prossimo = avere or essere (presente) + past participle

Forming the past participle

For regular verbs, the past participle is formed from the stem plus a class-specific ending:

The -ere class is the most irregular by far in the past participle — see the irregular list below. The -are class is almost entirely regular; the -ire class has a small set of irregulars (aperto, offerto, sofferto, morto, venuto, detto) but is mostly predictable.

Auxiliary choice: avere or essere?

The single biggest decision in forming the passato prossimo is whether to use avere or essere as the auxiliary. The rules:

Avere — the default

The vast majority of verbs take avere. Specifically, transitive verbs (verbs that take a direct object) almost always take avere.

Essere — for a defined set of intransitive verbs

A specific subset of intransitive verbs takes essere. These cluster into recognizable semantic groups:

Verbs that switch auxiliary based on transitivity

A handful of verbs take avere when used transitively and essere when used intransitively. The most important: correre, salire, scendere, cambiare, finire, cominciare, passare, vivere.

Participle agreement: the three rules

The past participle in the passato prossimo agrees in gender and number under specific conditions. Get these three rules right and you handle 99% of agreement situations.

Rule 1: With essere, the participle agrees with the SUBJECT

When the auxiliary is essere, the participle ends in -o, -a, -i, -e to match the subject's gender and number.

Rule 2: With avere, the participle DOES NOT agree with the subject

When the auxiliary is avere, the participle stays in the masculine-singular -o form regardless of the subject's gender or number.

Rule 3: With avere + preceding direct object pronoun, the participle agrees with the OBJECT

This is the subtler agreement rule. When avere is the auxiliary AND a direct object pronoun (lo, la, li, le, mi, ti, ci, vi) appears before the verb, the participle agrees with that object's gender and number.

With mi, ti, ci, vi, agreement is optional (preferred in writing, often dropped in casual speech): Ci ha visti / ci ha visto — both are accepted.

Reflexive verbs always take essere — and the participle agrees with the subject

Every reflexive verb takes essere in the passato prossimo, and the participle agrees with the subject (just like rule 1 above).

Note that even when the reflexive verb has a direct object (as in si sono lavate le mani — they washed their hands), the participle agrees with the subject, not the object. This is one of the few systematic exceptions to the general "avere + DO pronoun" agreement pattern, because reflexives always go with essere.

Irregular past participles — the essential list

The list below covers the irregular participles you must know. Almost all of them belong to the -ere class, which is where Italian piles up most of its past participle irregularities.

Two notes: (1) stato is the past participle of both essere and stare — context distinguishes. (2) Compounds inherit their root verb's irregular participle: promettere → promesso, riscrivere → riscritto, ricomporre → ricomposto.

Imperfetto vs passato prossimo: the comparison chart

The two past tenses encode different aspectual perspectives on the same event. The contrast is one of the most important grammatical decisions in Italian.

The two tenses cooperate constantly. A typical Italian past-tense sentence has the imperfetto setting the scene and the passato prossimo landing the event:

For the deeper aspectual treatment, see the imperfetto overview and imperfetto for ongoing actions. For the durative passato prossimo specifically, see passato prossimo for durative actions.

A worked paragraph: all rules in action

Here is a short narrative passage that exercises every key rule at once. Read it carefully — auxiliary choice, agreement, reflexive forms, and irregular participles are all on display.

Ieri sono andata al mercato, ho comprato del pane, ho incontrato Maria, e siamo tornate insieme. Ci siamo fermate al bar e abbiamo bevuto un caffè. Maria mi ha raccontato che si è trasferita a Milano per lavoro. Le ho detto che mi sarebbe mancata. Quando siamo uscite dal bar, pioveva forte e abbiamo dovuto correre fino a casa.

Notice:

• sono andata (essere + agreement: female speaker → -a)
• ho comprato, ho incontrato (avere + transitive — no agreement)
• siamo tornate (essere + agreement: two women → -e)
• ci siamo fermate (reflexive → essere + agreement with subject → -e)
• abbiamo bevuto (avere + irregular participle of bere)
• mi ha raccontato, le ho detto (avere + indirect object pronouns — no participle agreement)
• mi sarebbe mancata (mancare → essere + agreement with the female subject she's referring to)
• si è trasferita (reflexive → essere + agreement: female subject → -a)
• siamo uscite (essere + agreement: two women → -e)
• pioveva (imperfetto for the ongoing background)
• abbiamo dovuto (modal verb dovere with avere + transitive complement)

That single paragraph contains the whole system in action.

Common mistakes

Key takeaways

The passato prossimo combines a present-tense auxiliary (avere or essere) with a past participle. Three things to lock in:

1. Auxiliary choice is mostly predictable. Transitive verbs → avere. Motion, change of state, reflexives, weather → essere. A small set of verbs switches by transitivity (correre, salire, scendere, cambiare, finire, vivere).

2. Agreement follows three rules. With essere, participle agrees with subject. With avere, no subject agreement. With avere + preceding direct object pronoun, participle agrees with the object.

3. Memorize the irregular participles. They are concentrated in the -ere class. The list above contains the essential ~50; learn them as a set, because they recur in every compound tense (passato prossimo, trapassato prossimo, future perfect, conditional perfect).

For aspectual contrast — when to choose this tense over the imperfetto — return to the imperfetto overview and the durative passato prossimo. For the auxiliaries themselves, see avere in the present indicative and essere in the present indicative.