Infinitive for signs and instructions

Infinitive for signs and instructions in Italian

This guide explains how and why the Italian infinitive (verbs like parlare, scrivere, aprire) is used on signs, labels, buttons and short instructions. You will see when the infinitive is the best choice, how it differs from the imperative and other forms, and many natural examples with translations.

When do I use the infinitive on signs and instructions?

The infinitive is used on signs and in short instructions because it is:
- Impersonal: it does not address a single person (no tu/Lei). Example: Inserire la tessera (Insert the card).
- Concise: space on signs is limited, and the infinitive keeps messages short: Vietato fumare instead of È vietato fumare.
- Neutral and standard for technical directions: Premere il pulsante, Ritirare il biglietto.

Why the infinitive is common on signs

Impersonal instruction
Italian uses the infinitive to give instructions without choosing a person: the sign does not say "you do this"; it gives the action itself.
- Example: Premere per aprire. (Press to open.)

Short negative commands (prohibitions)
Negative commands directed at a general audience often appear as non + infinitive. This form is also the negative imperative for the familiar "tu", but on signs it reads as an impersonal rule:
- Example: Non fumare. (Do not smoke / No smoking.)

Politeness and formal notices
To be polite, signs often use "Si prega di" + infinitive: Si prega di non disturbare. (Please do not disturb.)

How do I form the infinitive (quick grammar)?

Regular forms
Italian infinitives end in -are, -ere, -ire.
- parlare (to speak), scrivere (to write), dormire (to sleep).

Common irregular infinitives you will see on signs
- essere, avere, fare, andare, dare, stare, uscire, venire, dire.
- Example on a sign: Fare attenzione. (Pay attention / Be careful.) — note: "Attenzione" alone is more usual on warnings.

Clitic pronouns attach to the infinitive
On instructions the object pronoun attaches to the infinitive: Non toccarlo. (Do not touch it.)
- Example with plural: Non toccarli. (Do not touch them.)

Negative imperative for "tu" uses non + infinitive
This is an important point learners often miss: for the familiar "tu" the negative command uses non + infinitive (not the ordinary imperative form). That makes many short prohibitions on signs look like infinitives but they are also grammatically the negative imperative:
- Non parlare! (Don’t speak!) — negative imperative (tu) or impersonal on a sign.

Common sign patterns and many examples

Notes: "Vietato fumare" uses the past participle vietato as an adjective with the infinitive; "Non fumare" is a short negative command.

Notes: Here the infinitive is neutral and direct; compare a spoken command (tu): "Premi il pulsante" (you press). On signs we prefer the infinitive form.

Notes: "Si prega di" + infinitive is very common on hotel doors, libraries, museums.

How the infinitive compares with the imperative and other forms

Infinitive vs. imperative (tone and audience)
- Infinitive: neutral, impersonal, concise. Good for signs and manuals. Example: Chiudere la porta. (Close the door.)
- Imperative (tu or Lei): addresses a person directly. Spoken commands: "Chiudi la porta!" (tu) or polite "Chiuda la porta!" (Lei).

On signs you will rarely see the polite Lei imperative; the infinitive keeps the message general and less personal.

Negative forms — what to use?
- For short prohibitions, non + infinitive is standard on signs: Non fumare. (Do not smoke.)
- Do not write *"Fumare proibito di"* or *"Vietato di fumare"* — those are ungrammatical. Correct forms: "Vietato fumare", "È vietato fumare", or "Divieto di fumare".

Common mistakes and how to avoid them

- Mistake: Using "Vietato di fumare."
Correction: "Vietato fumare." or "Divieto di fumare."
Explanation: "Vietato" (past participle used as adjective) does not need "di" before the infinitive.

- Mistake: Writing a full conjugated imperative where an impersonal message is better (e.g., "Chiudi la porta" on a public sign).
Tip: Prefer the infinitive: "Chiudere la porta." or the polite formula: "Si prega di chiudere la porta."

- Mistake: Confusing "Divieto di sosta" (noun form) with "Divieto di sostare" (rare).
Tip: Use the standard noun forms common on signs: "Divieto di sosta", "Divieto di accesso".

- Mistake: Placing the negation after the verb (e.g., "Fumare non").
Correction: Put "non" before the verb: "Non fumare."

Quick tips for writing or reading signs

- Use the infinitive to be neutral and concise: "Inserire la carta", "Chiudere la porta".
- Use "Non + infinitive" for short prohibitions: "Non fumare".
- Use "Vietato + infinitive" or "È vietato + infinitive" for formal prohibitions: "Vietato l'ingresso ai non addetti", "È vietato fumare".
- Use "Si prega di + infinitive" for polite requests: "Si prega di non fotografare".
- Attach object pronouns to the infinitive if needed: "Non toccarlo." (Do not touch it.)

Glossary (simple definitions)

Infinitive — the base form of the verb (in Italian: parlare, scrivere, aprire). Used on signs to give impersonal instructions.

Imperative — the verb form used to give direct commands (spoken): "Parla!" (speak!), negative for tu uses "Non + infinitive".

Impersonal — a form that does not address a specific person. Signs are usually impersonal.

Past participle — a verb form used as adjective or in compound tenses (e.g., vietato from vietare). Often appears on signs: "Vietato fumare."

Clitic pronoun — object pronouns that attach to verbs, including infinitives: mi, ti, lo, la, li, le, ci, vi. Example: "Non toccarlo." (Do not touch it.)

Extra: Quick list of very common signs (Italian → English)

- Vietato fumare. — No smoking / Smoking prohibited.
- Non fumare. — Do not smoke.
- Divieto di sosta. — No parking.
- Vietato l'accesso ai non addetti. — No entry to unauthorized personnel.
- Premere il pulsante per chiamare. — Press the button to call.
- Inserire la tessera. — Insert the card.
- Ritirare il biglietto. — Collect the ticket.
- Tenere chiusa la porta. — Keep the door closed.
- Indossare il casco. — Wear a helmet.
- È obbligatorio indossare il casco. — It is compulsory to wear a helmet.
- Si prega di non disturbare. — Please do not disturb.
- Non utilizzare in caso di incendio. — Do not use in case of fire.

Final short checklist for learners

- When you want a short, impersonal instruction on a sign, use the infinitive.
- For short prohibitions use "Non + infinitive" or "Vietato + infinitive."
- For polite notices use "Si prega di + infinitive."
- Remember clitic pronouns attach to the infinitive (Non toccarlo).
- Avoid adding an unnecessary "di" after "vietato." Use either "Vietato fumare" or "Divieto di fumare."

If you read Italian signs and feel unsure, compare the sign with these patterns; most public notices follow them closely.