Infinitive for instructions or signs

Infinitive for instructions or signs in Spanish

What does this use of the infinitive mean?

The infinitive in Spanish is the base form of the verb: verbs end in -ar, -er, or -ir (hablar, comer, vivir). On signs, labels, recipes and step-by-step instructions, Spanish often uses the infinitive as an impersonal, neutral way to tell people what to do or what is not allowed. In English you might see a gerund or an imperative: "No smoking" or "Do not smoke". In Spanish the parallel short form is usually "No fumar" (infinitive).

The infinitive is useful because it is short, clear and does not address a specific person (no tú / usted distinction). That makes it ideal for public notices, manuals and recipes.

When do I use the infinitive on signs and in instructions?

1) Prohibitions (rules):
- No + infinitive: a direct, short prohibition used on signs.
- NO FUMAR. (No smoking.)
- NO TIRAR BASURA. (Do not litter / No littering.)
- PROHIBIDO + infinitive: short for "Está prohibido + infinitive".
- PROHIBIDO ESTACIONAR. (Parking prohibited / No parking.)
- PROHIBIDO FUMAR EN TODO EL EDIFICIO. (Smoking is prohibited throughout the building.)
- SE + verb + infinitive (impersonal "se"):
- SE PROHÍBE FUMAR. (Smoking is prohibited.)
- SE SOLICITA SILENCIO. (Silence requested.)

2) Instructions and directions (manuals, recipes, lists of steps):
- Steps in manuals and recipes normally use the infinitive for each step.
- PRECALENTAR el horno a 180 °C. MEZCLAR harina y azúcar. AÑADIR los huevos. (Preheat the oven to 180 °C. Mix flour and sugar. Add the eggs.)
- COLOCAR el panel y APRETAR los tornillos. (Place the panel and tighten the screws.)

3) Warnings and safety labels:
- Short warnings use the infinitive to state actions to avoid or actions required.
- EVITAR EL CONTACTO CON LOS OJOS. (Avoid contact with eyes.)
- MANTENER FUERA DEL ALCANCE DE LOS NIÑOS. (Keep out of reach of children.)
- USAR GUANTES PROTECTORES. (Use protective gloves.)

4) Short commands on devices and product labels:
- Labels and small instructions often use infinitives. On devices you will also see imperatives; both are used—infinitive is impersonal, imperative addresses the user directly.
- PRESIONAR PARA ENCENDER. (Press to turn on.)
- EMPUJAR PARA ABRIR / TIRAR PARA CERRAR. (Push to open / Pull to close.)

5) Polite requests and region-specific formulas:
- POR FAVOR + infinitive: polite on notices.
- POR FAVOR, NO TOCAR. (Please do not touch.)
- FAVOR DE + infinitive (common in Mexico): polite instruction.
- FAVOR DE CERRAR LA PUERTA. (Please close the door.)
- SE RUEGA + infinitive: very polite/impartial.
- SE RUEGA RESPETAR EL SILENCIO. (Please respect the silence.)

How is the infinitive formed?

The infinitive is the base verb ending in -ar, -er or -ir.
- Examples: HABLAR, COMER, VIVIR, ABRIR, CERRAR, TIRAR, EMPUJAR, PRESIONAR.

On a sign or in a recipe simply use that base form. For negative rules put "NO" before it: NO + infinitive (NO FUMAR, NO ENTRAR).

Infinitive vs. imperative: when to choose which?

Imperative (commands addressing someone):
- Imperatives change depending on who you address (tú, usted, ustedes, vosotros):
- No fumes. (tú) — Don't smoke.
- No fume. (usted) — Don't smoke. (formal)
- No fumen. (ustedes) — Don't smoke. (plural)

Infinitive (impersonal / neutral):
- No fumar. — No smoking.

Choose the infinitive when you want an impersonal, general instruction (common on signs and instructions). Choose the imperative when you want to address people directly (e.g., a staff member giving a direct order, or a friend).

Note: On doors and small labels you will often find imperatives (EMPUJE / TIRE) because you're addressing the person actually touching the door. Manuals and public signs usually prefer infinitives for neutrality.

Other impersonal constructions used on signs

- PROHIBIDO + infinitive: short, strong prohibition (elliptical form of "Está prohibido ...").
- PROHIBIDO EL PASO. (No entry.)
- SE + verb (impersonal/passive):
- SE PROHÍBE FUMAR. (Smoking is prohibited.)
- SE SOLICITA NO FUMAR. (Please do not smoke.)
- FAVOR DE + infinitive: (polite) commonly used in Mexican Spanish.
- FAVOR DE NO DEJAR LA PUERTA ABIERTA. (Please do not leave the door open.)

These alternatives have slightly different tones: PROHIBIDO = rule; SE PROHÍBE = formal/official; FAVOR DE / SE RUEGA = polite.

Common mistakes and tips

- Wrong: "No fumando." — Don't use the gerund here. Correct: "No fumar."
- Wrong: "Prohibir fumar." — On a sign write "Prohibido fumar" or "Se prohíbe fumar." "Prohibir fumar" is an infinitive phrase that needs a subject or context.
- Watch accents: "Se prohíbe" (accent on the í) — correct spelling matters on formal notices.
- Avoid mixing tones in one sign: mixing "Prohibido" and a polite phrase can look odd. Pick one tone: strict (PROHIBIDO), neutral (NO + infinitive), or polite (POR FAVOR / SE RUEGA).
- Region: some verbs vary by country (aparcar vs estacionar). Choose the verb that your audience understands.

Tips:
- For step-by-step instructions (recipe, manual) use the infinitive for each step for clarity.
- For short, public prohibitions use NO + infinitive or PROHIBIDO + infinitive.
- For polite requests use POR FAVOR / FAVOR DE + infinitive or SE RUEGA + infinitive.

Examples (grouped) — many natural examples

Prohibitions and rules
- NO FUMAR. (No smoking.)
- PROHIBIDO FUMAR. (Smoking prohibited.)
- SE PROHÍBE FUMAR EN TODAS LAS ÁREAS. (Smoking is prohibited in all areas.)
- NO TIRAR BASURA. (Do not litter / No littering.)
- PROHIBIDO ESTACIONAR. (No parking.)
- NO APROXIMARSE A LAS MÁQUINAS. (Do not approach the machines.)

Signs and directions
- EMPUJAR (on a sticker) — or EMPUJE (imperative). (Push.)
- TIRAR (on a small bin) — or TIRE. (Pull.)
- SALIDA. (Exit.) — (note: SALIDA is a noun, not infinitive)
- ENTRADA. (Entrance.)

Manual steps and recipes
- AÑADIR 200 g de harina. (Add 200 g of flour.)
- MEZCLAR hasta obtener una masa homogénea. (Mix until you get a homogeneous dough.)
- HORNEAR 30 minutos a 180 °C. (Bake 30 minutes at 180 °C.)
- COLOCAR la pieza y APRETAR los tornillos. (Place the piece and tighten the screws.)

Warnings and safety labels
- EVITAR EL CONTACTO CON LOS OJOS. (Avoid contact with eyes.)
- NO INGESTAR. (Do not ingest.)
- MANTENER EN LUGAR FRESCO Y SECO. (Keep in a cool, dry place.)
- MANTENER FUERA DEL ALCANCE DE LOS NIÑOS. (Keep out of reach of children.)

Polite notices
- POR FAVOR, NO TOCAR LAS OBRAS. (Please do not touch the artworks.)
- FAVOR DE CERRAR LA PUERTA AL SALIR. (Please close the door when leaving.)
- SE RUEGA NO HABLAR DURANTE LA FUNCION. (Please do not talk during the performance.)

Impersonal/passive forms
- SE PROHÍBE EL PASO. (Entry is prohibited.)
- ESTÁ PROHIBIDO FUMAR. (It is forbidden to smoke.)

Quick reference: common patterns

- NO + infinitive (short, direct prohibition): NO FUMAR. / NO ENTRAR.
- PROHIBIDO + infinitive (official rule): PROHIBIDO APARCAR.
- SE + verb + infinitive (impersonal/passive): SE PROHÍBE FUMAR.
- POR FAVOR / FAVOR DE + infinitive (polite): POR FAVOR, NO TOCAR. / FAVOR DE APAGAR EL TELEFONO.
- Infinitive list for steps: AÑADIR. MEZCLAR. CALENTAR.

Glossary (simple definitions)

- Infinitive: base form of the verb (hablar, comer, vivir). Used impersonal on signs and instructions.
- Imperative: the verb form used to give a direct command to a person (¡Habla!, Hable, Hablad, Hablen).
- Impersonal "se": a passive-like construction to talk about rules or general statements (Se prohíbe fumar = Smoking is prohibited).
- Gerund: -ando / -iendo form (hablando, comiendo). Not used for fixed rules on signs—do not write "No fumando."

Final notes

Using the infinitive for instructions and signs is a quick, neutral way to tell people what to do or not do. Choose this form for public notices, recipe steps and manuals. Use imperatives when you want to address someone directly. When in doubt for a sign aimed at the general public, the infinitive is a safe, standard choice.