What is the si impersonale in Italian?

It is si plus a third-person singular verb, used when the subject is people in general: si mangia bene (you eat well), non si sa mai (you never know). It covers what English expresses with you, one, people, they, or the passive.

What is the difference between si impersonale and si passivante?

The si impersonale has no object or a singular one, so the verb is singular: si parla italiano. The si passivante has a plural noun that acts as the subject, so the verb is plural: si parlano molte lingue. In everyday use they work as one structure, and the noun decides the verb form.

How do you use the si impersonale with reflexive verbs?

Replace the first si with ci: ci si alza presto (people get up early), ci si diverte (people have fun). Italian never puts si si together.

Which auxiliary does the si impersonale take in the passato prossimo?

Always essere. With verbs that normally take avere, the participle ends in -o: si è mangiato bene. With verbs that normally take essere, it ends in -i: si è arrivati tardi.

How do you tell the impersonal si from the reflexive si?

A reflexive si has a definite subject that does the action to itself: Marco si lava (Marco washes himself). An impersonal si has no subject at all, and you can translate it with people or you: qui si lavora molto (people work a lot here).

Italian grammar · Intermediate

Si Impersonale

Written by Parrot Italian Team, Italian Curriculum Editors · Reviewed October 2026

The si impersonale is si plus a third-person verb, used to say what people in general do: si mangia bene qui, you eat well here. It does the job of English one, you, people, or they when no particular person is meant. With a plural noun it becomes the si passivante, and the verb turns plural: si vendono case, houses for sale.

In Italia si mangia bene.

You eat well in Italy.

What it is

English has no single word for people in general, so it borrows you, one, they, or the passive: you never know, one must be careful, they say, English is spoken here. Italian uses one structure for all of them: si plus a verb in the third person. The person is never named. Si only tells you that someone, anyone, does the action.

Come si dice thank you in italiano? Si dice grazie. (How do you say thank you in Italian? You say grazie.)

How to spot it

Look for si directly before a third-person verb when nobody in the sentence could be doing the action to themselves. If people in general can replace si, it is impersonal, not reflexive.

Qui non si fuma. (No smoking here.)
Si dice che domani pioverà. (They say it will rain tomorrow.)
A che ora si mangia? (What time do we eat?)
Da qui si vede il mare. (You can see the sea from here.)

In everyday speech, si often means we: allora, si va? (so, shall we go?). The general you is still the standard meaning.

Si Impersonale Quick Reference

The forms of the si impersonale and the si passivante. The verb is always third person.

Construction	Verb form	Example
si + verb with no object	third person singular	Si parte alle otto. (We leave at eight.)
si + singular noun	third person singular	Qui si parla inglese. (English is spoken here.)
si + plural noun (si passivante)	third person plural	Si vendono biciclette. (Bicycles for sale.)
si + essere + adjective	adjective in the masculine plural	In vacanza si è più contenti. (People are happier on holiday.)
reflexive verb	ci si + third person singular	Ci si diverte. (People have fun.)
compound tense, verb that takes avere	si è + participle in -o	Si è mangiato bene. (We ate well.)
compound tense, verb that takes essere	si è + participle in -i	Si è arrivati tardi. (We got there late.)
modal verb	si può, si deve + infinitive	Non si può fumare. (Smoking isn't allowed.)

Common Si Impersonale Examples in Italian

The si impersonale in everyday sentences:

General Truths

In Italia si cena tardi.: In Italy people have dinner late.
Non si sa mai.: You never know.

These sentences describe what people usually do, not what one person does.

Rules and Signs

Qui non si può parcheggiare.: You can't park here.
In biblioteca si parla a bassa voce.: In the library you speak quietly.

Signs and instructions use the si impersonale because they address everyone.

Si Passivante

In questo negozio si vendono libri usati.: This shop sells used books.
Si cercano camerieri.: Waiters wanted.
Si possono prenotare i biglietti online.: You can book tickets online.

With a plural noun the verb is plural, and with a modal verb the modal is plural: si possono prenotare.

Reflexive Verbs and Compound Tenses

La domenica ci si alza tardi.: On Sundays people get up late.
Alla festa ci si è divertiti molto.: Everyone had a great time at the party.
Ieri si è lavorato fino a tardi.: Yesterday we worked until late.

Compound tenses always use essere. The participle ends in -o or -i depending on the verb's usual auxiliary.

How the Si Impersonale Works

Six rules cover the verb form, agreement, and the combinations with other pronouns.

Singular Verb, No Named Subject

With no object, or with a singular object, the verb is always third person singular.

Si studia meglio la mattina.

You study better in the morning.

si + third person singular.

Plural Noun, Plural Verb

When a plural noun follows, the verb agrees with it. Grammars call this the si passivante, because the noun is really the subject: si vendono case means houses are sold.

Al mercato si trovano prodotti freschi.

You can find fresh produce at the market.

si vende una casa, si vendono due case.

Adjectives Go Plural

After si è, si diventa, or si rimane, an adjective takes the masculine plural, because si refers to people in general. The verb stays singular.

Quando si è stanchi, si sbaglia di più.

When you're tired, you make more mistakes.

si è stanchi, not si è stanco.

Reflexive Verbs Use Ci Si

Italian never says si si. With a reflexive verb, the first si becomes ci: ci si sveglia, ci si veste.

In campagna ci si sveglia presto.

In the countryside people wake up early.

si + svegliarsi = ci si sveglia.

Compound Tenses Use Essere

The si impersonale always takes essere in compound tenses. If the verb normally takes avere, the participle ends in -o. If it normally takes essere, the participle ends in -i.

Si è dormito poco e si è partiti presto.

We slept very little and left early.

si è dormito (avere verb), si è partiti (essere verb).

With Other Pronouns

Lo, la, li, and le go before si: lo si dice spesso (people often say it). Ne comes after si, and si changes to se: se ne parla.

Se ne parla da settimane.

People have been talking about it for weeks.

si + ne = se ne.

Common Mistakes with Si Impersonale

Incorrect: Si vende biciclette. (Bicycles for sale.)

Correct: Si vendono biciclette. (Bicycles for sale.)

With a plural noun, the verb agrees with that noun. You will see the singular on informal signs, but the plural is the standard form.

Incorrect: Si si alza presto. (People get up early.)

Correct: Ci si alza presto. (People get up early.)

Two si pronouns cannot stand together. The impersonal si becomes ci before the reflexive si.

Incorrect: Quando si è stanco, si dorme male. (When you're tired, you sleep badly.)

Correct: Quando si è stanchi, si dorme male. (When you're tired, you sleep badly.)

The verb is singular, but an adjective describing people in general is masculine plural.

Incorrect: Si ha mangiato bene. (We ate well.)

Correct: Si è mangiato bene. (We ate well.)

The si impersonale always takes essere in compound tenses, even with verbs that normally take avere.

Quick Check: Si Impersonale

Put the verb in brackets into the si impersonale or the si passivante.

1. In Italia ___ (bere) molto caffè.

Answer: si beve

Caffè is singular, so the verb is singular.

2. Dal balcone ___ (vedere) le montagne.

Answer: si vedono

Le montagne is plural, so the verb is plural.

3. La mattina ___ (svegliarsi) presto.

Answer: ci si sveglia

A reflexive verb needs ci si.

4. Quando ___ (essere) giovani, tutto sembra possibile.

Answer: si è

The verb is singular and the adjective is plural.

5. Ieri sera ___ (ballare) fino a mezzanotte.

Answer: si è ballato

Ballare takes avere, so the participle ends in -o.

Si Impersonale FAQs

What is the si impersonale in Italian?: It is si plus a third-person singular verb, used when the subject is people in general: si mangia bene (you eat well), non si sa mai (you never know). It covers what English expresses with you, one, people, they, or the passive.
What is the difference between si impersonale and si passivante?: The si impersonale has no object or a singular one, so the verb is singular: si parla italiano. The si passivante has a plural noun that acts as the subject, so the verb is plural: si parlano molte lingue. In everyday use they work as one structure, and the noun decides the verb form.
How do you use the si impersonale with reflexive verbs?: Replace the first si with ci: ci si alza presto (people get up early), ci si diverte (people have fun). Italian never puts si si together.
Which auxiliary does the si impersonale take in the passato prossimo?: Always essere. With verbs that normally take avere, the participle ends in -o: si è mangiato bene. With verbs that normally take essere, it ends in -i: si è arrivati tardi.
How do you tell the impersonal si from the reflexive si?: A reflexive si has a definite subject that does the action to itself: Marco si lava (Marco washes himself). An impersonal si has no subject at all, and you can translate it with people or you: qui si lavora molto (people work a lot here).