Essere vs Avere: Choosing the Right Auxiliary

One of the trickiest moments for Italian learners comes right when you start speaking about the past. You know the passato prossimo is built from an auxiliary verb plus a past participle — but which auxiliary do you use? Avere (to have) or essere (to be)? Getting this wrong is one of the most common mistakes at A2 level, but the good news is that the choice follows a clear pattern once you know where to look.

The Big Picture: Two Auxiliaries, One Rule

The core principle is this: transitive verbs — verbs that can take a direct object — use avere. Intransitive verbs — verbs that describe movement, a change of state, or simply existing — usually use essere. The practical test is simple: ask yourself "did the subject do something to something else?" If yes, avere. If the verb describes where the subject went, what the subject became, or how the subject existed, it is likely essere.

Avere: The Majority Auxiliary

The majority of Italian verbs use avere. These are verbs where the subject acts on something — there is a direct object in the sentence, even if it is not always stated. When you use avere, the past participle does not change for gender or number — it stays locked in the masculine singular form.

Essere: Movement, Change, and State

A smaller but very important set of verbs uses essere. These fall into recognisable categories: movement to or from a place, change of state, and existing or remaining. The critical difference with essere: the past participle must agree in gender and number with the subject of the verb, just like an adjective.

Past Participle Agreement with Essere

When the auxiliary is essere, the past participle behaves like an adjective: it changes its ending to match the gender (masculine or feminine) and number (singular or plural) of the subject. There are four possible endings: -o (masculine singular), -a (feminine singular), -i (masculine or mixed plural), -e (feminine plural).

A Practical Memory Trick

Many teachers offer mnemonic lists or visual tricks — the "house of essere" is a popular one — to help learners remember the core essere verbs. But the mental image that works best for most people is this: think of essere verbs as verbs where the subject moves itself from one place to another, or where the subject itself transforms. The subject is not acting on an external object — it is the thing in motion or transformation.

• Movement from A to B: andare, venire, arrivare, partire, tornare, uscire, entrare, salire (to go up), scendere (to go down), cadere
• Change of state: nascere, morire, diventare, crescere, ingrassare (to put on weight), dimagrire (to lose weight), invecchiare (to grow old)
• Existence and state: essere, stare, restare, rimanere
• Reflexive verbs (always): alzarsi, lavarsi, vestirsi, svegliarsi — reflexive verbs always use essere, no exceptions

Verbs That Work Both Ways

A handful of verbs can be either transitive or intransitive depending on how they are used, and this changes the auxiliary. The verb scendere (to go down) is a good example:

Similarly, salire (to go up) usually takes essere, but takes avere when a direct object follows: sono salito al terzo piano vs. ho salito le scale. And correre (to run) takes essere when the destination is emphasised (sono corso a casa — I ran home) but avere in sports or general movement contexts (ho corso per un'ora — I ran for an hour).

What About Weather Verbs?

Impersonal weather verbs like piovere (to rain) and nevicare (to snow) are a special case: both è piovuto and ha piovuto are accepted in standard Italian. In practice, the essere form is slightly more common in writing and in central and southern Italy, while avere is common in the north. Either form is correct — native speakers use both.

Side-by-Side: Avere vs Essere in Action

These contrasting pairs show the difference clearly:

Common Mistakes to Avoid

1. Using avere with andare, venire, partire: These movement verbs always take essere. "Ho andato" does not exist — it must be "sono andato/a".
2. Forgetting past participle agreement with essere: If you use essere, the ending must match the subject's gender and number. "Siamo arrivato" is wrong — a group must be "siamo arrivati" (mixed) or "siamo arrivate" (all female).
3. Changing the participle when using avere: With avere the participle is invariable. "Ho mangiata la pizza" is incorrect — it should be "ho mangiato la pizza" regardless of whether the speaker is male or female.
4. Confusing essere and stare: Both have the same passato prossimo (sono stato/a), but they come from different infinitives. "Sono stato a Firenze" (I was/stayed in Florence) works for both verbs — the meaning is usually clear from context.

Essere and Avere in Italian Texts

Once you start reading Italian stories, you will encounter the passato prossimo on almost every page. Characters arrive at places (è arrivato), leave on journeys (è partita), fall in love (si è innamorato), and have conversations (ha detto, ha risposto). Seeing these forms dozens of times in real context is the fastest way to move from knowing the rule to simply feeling which auxiliary sounds right.

On LingueLibrary, you can click any passato prossimo form as you read and instantly see the full conjugation table — including which auxiliary the verb takes and how the past participle agrees. Whether you spot è andato in a travel scene or ho capito in a conversation, a single click explains everything.