Walk down any Italian street and you will see it on dozens of shop windows: si vendono libri, si affittano camere, si parla inglese. This is the si passivante — Italian's most economical passive construction, and arguably its most distinctive. It builds a passive sentence without an auxiliary verb and without a perfect participle, using only the clitic si and the regular verb.
The trick — and the source of every learner mistake — is that the verb agrees not with si but with what would be the direct object in an active sentence. Si vende il pane (singular). Si vendono i libri (plural). The "object" has been promoted to a subject, and the verb agrees with it.
How it works
Take a transitive verb and a direct object. Place si before the verb. Make the verb agree with what was the object.
| Active | Si passivante | Literal English |
|---|---|---|
| Vendono il pane qui. | Si vende il pane qui. | Bread is sold here. |
| Vendono libri qui. | Si vendono libri qui. | Books are sold here. |
| Mangiano la pizza al sabato. | Si mangia la pizza al sabato. | Pizza is eaten on Saturdays. |
| Mangiano molte verdure qui. | Si mangiano molte verdure qui. | Many vegetables are eaten here. |
Si vende il pane qui.
Bread is sold here.
Si vendono libri usati a metà prezzo.
Used books are sold at half price.
Si parla italiano.
Italian is spoken here.
Si affittano appartamenti per studenti.
Apartments are rented to students.
In questo ristorante si mangiano i piatti tipici della Toscana.
In this restaurant the typical dishes of Tuscany are eaten.
The agreement rule
This is the rule that trips up every learner. The verb is third person singular when the object is singular, and third person plural when the object is plural. The clitic si does not control agreement — the noun does.
| Object | Verb | Sentence |
|---|---|---|
| il libro (singular) | si vende | Si vende il libro qui. |
| i libri (plural) | si vendono | Si vendono i libri qui. |
| una pizza (singular) | si mangia | Si mangia una pizza. |
| tante pizze (plural) | si mangiano | Si mangiano tante pizze. |
In Italia si beve molto caffè.
In Italy a lot of coffee is drunk.
In Italia si bevono molti caffè al giorno.
In Italy many coffees are drunk per day.
Si passivante vs si impersonale: the critical distinction
Italian has two si constructions that look almost identical and behave very differently. Confusing them is the single most common B1 mistake with si.
| Si passivante | Si impersonale | |
|---|---|---|
| Verb type | Transitive (with object) | Intransitive or no object |
| Verb agreement | Singular OR plural (matches object) | Always 3rd person singular |
| Has a grammatical subject? | Yes (the "object") | No |
| Example | Si vendono libri. | Si lavora molto qui. |
| Translation | Books are sold. | One works a lot here. |
The decision rule: does the verb have a direct object? If yes, you have si-passivante and the verb agrees with it. If no, you have si-impersonale and the verb stays in third person singular.
Si lavora molto in questa azienda.
One works a lot at this company. (intransitive — si impersonale, always singular)
Si producono molte auto in questa azienda.
Many cars are produced at this company. (transitive with plural object — si passivante, plural agreement)
For the full treatment of the impersonal si, see si impersonale.
Compound tenses: the auxiliary is always essere
When si-passivante moves into compound tenses (passato prossimo, trapassato, futuro anteriore, etc.), the auxiliary is always essere — never avere. And the past participle agrees with the grammatical subject.
| Subject | Conjugation | Sentence |
|---|---|---|
| il libro (m. sg.) | si è venduto | Si è venduto il libro. |
| la casa (f. sg.) | si è venduta | Si è venduta la casa. |
| i libri (m. pl.) | si sono venduti | Si sono venduti i libri. |
| le case (f. pl.) | si sono vendute | Si sono vendute le case. |
Si è bevuto tutto il vino alla festa.
All the wine was drunk at the party.
Si sono bevute tre bottiglie di vino alla festa.
Three bottles of wine were drunk at the party.
Negli anni '80 si sono costruiti molti grattacieli a Milano.
In the '80s many skyscrapers were built in Milan.
Why shop windows love this construction
Italian commerce runs on si-passivante because it is impersonal, economical, and direct. Si vendono libri says "books for sale here" without naming who is selling — perfect for a sign that anyone might read.
Si parla inglese.
English spoken here. (sign in a hotel)
Si fanno fotocopie.
Photocopies made here. (sign in a stationery shop)
Si riparano scarpe.
Shoes repaired here. (sign at a cobbler)
Si cercano camerieri.
Waiters wanted. (job notice)
Si offre lavoro a tempo pieno.
Full-time job offered.
The English equivalents either go elliptical ("books for sale," "English spoken here") or use a passive without an agent. Italian has a single dedicated construction that does the job in three or four words.
You cannot add an agent
This is the biggest restriction on si-passivante: you cannot specify who is doing the action. There is no way to say "si vendono libri da Marco" meaning "books are sold by Marco." If you need to name the agent, you must abandon si-passivante and use either an active sentence or the regular essere-passive.
❌ Si vendono libri da Marco.
Incorrect — si-passivante cannot take an agent phrase.
✅ Marco vende libri.
Correct — use active voice when the agent matters.
✅ I libri vengono venduti da Marco.
Correct — venire-passive accepts an agent.
This is actually a feature, not a bug. The construction's strength is its impersonality. As soon as you have an agent in mind, si-passivante is the wrong tool. For agent expressions in passive voice, see expressing the agent with da.
Word order: object can come before or after
Si-passivante allows flexible word order. The object (= grammatical subject) can sit before or after the verb. The choice depends on emphasis and information flow.
Si vendono libri usati qui.
Used books are sold here. (object after verb — neutral, common in signs)
I libri usati si vendono al primo piano.
Used books are sold on the first floor. (object before verb — topic continuation, more common in conversation)
Qui si parlano molte lingue.
Many languages are spoken here.
Molte lingue si parlano in questa città.
Many languages are spoken in this city.
Common mistakes
❌ Si vende libri qui.
Incorrect — verb must agree with the plural object 'libri'.
✅ Si vendono libri qui.
Correct — plural object triggers plural verb.
❌ Si parlano italiano in questa scuola.
Incorrect — italiano is singular, so the verb must be parla, not parlano.
✅ Si parla italiano in questa scuola.
Correct — singular object, singular verb.
❌ Si ha venduto la casa il mese scorso.
Incorrect — si-passivante (and any si-construction) takes essere, not avere, in compound tenses.
✅ Si è venduta la casa il mese scorso.
Correct — essere as auxiliary, participle agrees with feminine singular subject.
❌ Si vendono libri da uno studente.
Incorrect — agent phrase with da is not allowed in si-passivante.
✅ Uno studente vende libri.
Correct — switch to active voice if an agent is involved.
❌ In Italia si mangiano molto bene.
Incorrect — 'mangiare bene' here has no direct object, so this is si-impersonale and stays singular.
✅ In Italia si mangia molto bene.
Correct — no object means si-impersonale, third person singular.
Key takeaways
The si passivante is the Italian sign-language of commerce, instructions, and impersonal description. It is built from a clitic + a regular verb, and the verb agrees with what looks like an object but is actually a promoted subject.
Three things to internalize:
- Verb agreement matches the "object." Singular object → singular verb. Plural object → plural verb. Si vende il pane but si vendono i libri.
- Compound tenses use essere. Si è venduto, si sono venduti — never si ha venduto. Participles agree with the subject.
- No agent allowed. If you need to say who did it, switch to active voice or the essere-passive with da.
Once you can hear the agreement difference between si vende (singular) and si vendono (plural), Italian shop windows, recipes, and informal instructions stop being grammatical puzzles and start being readable text.
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Open the Italian course →Related Topics
- Passive with EssereB1 — The all-purpose Italian passive: essere + past participle, with the participle agreeing with the subject. Works in every tense and mood, including the tongue-twisting 'è stata scritta' double-essere compound.
- Passive with Venire (Action-Emphasized Passive)B1 — The venire passive — Italian's way of grammatically distinguishing 'the door is closed (state)' from 'the door gets closed (action)' — and why it disappears in compound tenses.
- Expressing the Agent with DaB1 — Italian uses da — and only da — to introduce who did the action in a passive sentence. Why this preposition matters, when to omit the agent, and why naming the doer often signals you should switch to active voice.
- Si Impersonale: Impersonal SiB1 — How Italian uses si + 3rd person singular to talk about generic 'one,' 'you,' or 'people' — the grammar of proverbs, signs, and casual generalizations. With the strange ci si trick when reflexives are involved.
- Passive Voice: Complete ReferenceB1 — All four Italian passive constructions side by side — essere, venire, andare, and si-passivante. When to use each, what they really mean, and how to choose between them.