Signs and Rules: Using the Infinitive (No fumar)
Grammar Rule in 30 Seconds
Use the infinitive verb form to give impersonal, general instructions or prohibitions on signs and in manuals.
- Use the infinitive for general rules: 'No fumar' (No smoking).
- Use it for instructions: 'Presionar el botón' (Press the button).
- It is gender-neutral and applies to everyone equally.
Overview
In Spanish, the infinitive form of a verb can function as an impersonal command, instruction, or prohibition. This usage is distinct from personal imperatives, which are directed at a specific individual or group. You will encounter this grammatical construction frequently in public spaces, digital interfaces, instructional manuals, and general advice.
Its primary characteristic is its impersonality: it refers to an action that should or should not be performed by anyone who encounters the message, without specifying a direct addressee. For a B2 learner, understanding this nuance is critical for interpreting public signage accurately and for producing idiomatic Spanish in certain contexts. This pattern leverages the inherent neutrality of the infinitive, transforming a potential action into a universal directive.
How This Grammar Works
El fumar es malo – Smoking is bad), in this context, they convey a direct instructional force. The absence of a conjugated verb form signifies that the command applies universally, independent of person, number, or tense.-ar, -er, or -ir (e.g., hablar, comer, vivir). When used impersonally as a command, this base form remains unchanged. It is not conjugated.No fumar directly states "No smoking" as a general rule, in contrast to No fumes, which would specifically tell you not to smoke.Formation Pattern
-ar, -er, -ir) never changes, regardless of who might be implied by the instruction. This eliminates the complexities of personal verb conjugations.
Empujar (Push) or Tirar (Pull) on a door, or Guardar cambios (Save changes) in a software interface.
No directly before the infinitive. This is a crucial distinction from personal imperatives, where No also precedes the verb but the verb itself is conjugated. For instance, No tocar (Do not touch) or No estacionar (No parking).
No still comes first, followed by the infinitive with the attached pronoun(s). For example, Sentarse (Sit down) or No sentarse (Do not sit down). The stress might shift to accommodate the added syllable, sometimes requiring a written accent (e.g., Lavarse is lavar + se).
Entrar (Enter), Abrir (Open) |
No + Infinitive (+ complements) | No pisar (Do not step), No tirar (Do not throw) |
-se, etc.) | Lavarse (To wash oneself), Sentarse (To sit down) |
No + Infinitive + Reflexive Pronoun | No lavarse (Do not wash oneself), No sentarse (Do not sit down) |
Confirmarlo: Confirmar + lo (Confirm it)
No abrirla: No + abrir + la (Do not open it)
Servirse: Servir + se (To serve oneself)
No servírselo: No + servir + se + lo (Do not serve it to oneself)
When To Use It
No aparcar(No parking)Cerrar la puerta al salir(Close the door upon leaving)Mantener la distancia de seguridad(Keep a safe distance)
usted) or informal (tú) address. It denotes the action the system will perform or prompts the user to perform a general action.Aceptar(Accept)Cancelar(Cancel)Guardar(Save)Saltar intro(Skip intro – common on streaming platforms)
Mezclar todos los ingredientes(Mix all ingredients)Calentar a fuego lento(Heat over low heat)Ajustar los tornillos(Adjust the screws)
Nunca dejar de aprender(Never stop learning)Vivir el presente(Live the present)No mirar atrás(Don't look back)
Construir el futuro (Building the future).Common Mistakes
tú (informal singular), usted (formal singular), vosotros/as (informal plural, primarily Spain), or ustedes (formal plural, all regions).tú) | Correct Usage (usted) |No comer la comida | No comas la comida | No coma la comida |Abrir la ventana | Abre la ventana | Abra la ventana |Sentarse aquí | Siéntate aquí | Siéntese aquí |No: The negation particle No must always precede the infinitive. Placing it after the verb, as might be done in some informal English constructions (e.g., "Smoking not permitted"), is incorrect in Spanish.- Incorrect:
Fumar no - Correct:
No fumar
- Incorrect:
Se no sentar(for "Do not sit down") - Correct:
No sentarse
- Incorrect:
Le no decir(for "Do not tell him/her") - Correct:
No decirle
¡A + Infinitive!: The construction ¡A + infinitive! (e.g., ¡A comer!, ¡A trabajar!) is an energetic call to action directed at a group, often children or close acquaintances. It is a specific type of informal, collective imperative, not a general impersonal instruction. While both use the infinitive, their function and tone are entirely different.¡A correr!(Let's run! / Get running! – to a group)No correr(No running – public sign)
- Incorrect:
Prohibimos fumar(if intended as an impersonal sign) - Correct:
No fumarorSe prohíbe fumar
Real Conversations
While the impersonal infinitive is primarily associated with written instructions and public notices, it does have a place in spoken and informal communication, though its usage is highly context-dependent and generally limited to specific scenarios. It is crucial for B2 learners to distinguish these contexts from direct, personal conversational commands.
1. Quick Notes and Reminders (Spoken Aloud or Mental): Native speakers might use the infinitive as a shorthand for personal reminders, often spoken to themselves or quickly jotted down. This mirrors the conciseness of a public sign but is self-directed.
- Comprar leche. (Buy milk. – as a mental note or on a shopping list)
- Llamar a Juan. (Call Juan. – a quick self-reminder)
- Pagar facturas. (Pay bills. – a task on a to-do list)
2. Informal Texting and Messaging: In very casual digital communication, especially among younger speakers, the infinitive can be used for brevity when conveying a suggestion or a very gentle, indirect instruction that doesn't feel like a harsh command. This is more common in Latin American Spanish than in Spain.
- Traer algo para la cena. (Bring something for dinner. – an informal suggestion to a friend)
- Pasar por mi casa más tarde. (Stop by my place later. – a casual invitation)
- No preocuparse. (Don't worry. – a comforting, general statement)
3. Stating Goals, Aspirations, or General Intentions: When listing personal or collective objectives, the infinitive provides a concise way to express actions or states without a specific subject or timeline, giving them a universal quality.
- Aprender un nuevo idioma, viajar por el mundo. (Learn a new language, travel the world. – in an Instagram bio or personal statement)
- Mejorar la comunicación en el equipo. (Improve team communication. – an agenda point or general goal)
4. Summarizing Action Points in Professional Contexts (Informal): In less formal business meetings or email summaries, an infinitive can denote an action item without assigning it to a specific person, implying it's a general task for the group or someone designated later.
- Revisar el presupuesto. (Review the budget. – from meeting notes)
- Enviar el informe antes del viernes. (Send the report before Friday. – a reminder of a general task)
Important Note
Quick FAQ
No, quite the opposite. Using the impersonal infinitive in these contexts is the standard, most neutral, and therefore most polite way to issue a general instruction or prohibition. It avoids singling out any individual, making the rule universally applicable without being accusatory.
Aceptar instead of Acepta or Acepte?Applications use the impersonal infinitive (Aceptar, Cancelar, Guardar) because it refers to the action itself, independent of the user. This maintains a consistent and neutral interface regardless of the user's relationship with the software (formal/informal) or their native dialect.
Absolutely. The infinitive is perfect for listing aspirations, hobbies, or personal philosophies in a concise and impactful way. For example, Vivir, amar, reír (Live, love, laugh) or Crear, inspirar, viajar (Create, inspire, travel) are very common and idiomatic.
Yes, this construction works universally for all Spanish verbs, including irregular ones like ser (to be), ir (to go), or hacer (to do/make). The infinitive form is always consistent (ser, ir, hacer) and never changes in this usage, making it one of the most reliable grammatical patterns.
No fumar and Se prohíbe fumar?Both convey a prohibition against smoking, but their grammatical structure and subtle implications differ. No fumar is a direct, impersonal instruction – a concise command to avoid the action. Se prohíbe fumar uses the impersonal se construction (passive voice), meaning "Smoking is prohibited" or "One prohibits smoking." Se prohíbe fumar sounds more formal and emphasizes the legal or institutional authority behind the prohibition, making it a statement about the prohibition rather than a direct command. No fumar is generally more direct and common on simple signage.
Añade (Spain) and sometimes Añadir (Latin America). Which is correct?Both are correct, but they reflect regional preferences. In Spain, it's common for recipes and informal instructions to use the tú imperative form (Añade, Mezcla). In Latin America, the impersonal infinitive (Añadir, Mezclar) is widely preferred for recipes and general instructions. Both convey the same meaning, but using the infinitive in Latin America sounds more natural and less like a direct order to the reader.
Yes, it is entirely appropriate for general guidelines, policies, or rules that apply to everyone within an organization. For instance, Mantener limpio el espacio de trabajo (Keep the workspace clean) or Reportar cualquier incidente inmediatamente (Report any incident immediately) are suitable in such contexts. It maintains a professional and objective tone. However, for direct requests to specific individuals, continue to use formal usted forms.
Infinitive Formation
| Verb Type | Example | Infinitive Form |
|---|---|---|
|
-ar
|
Hablar
|
Hablar
|
|
-er
|
Comer
|
Comer
|
|
-ir
|
Vivir
|
Vivir
|
Meanings
The infinitive is used to express commands or prohibitions that apply to the general public rather than a specific individual.
Prohibitions
Stating what is forbidden.
“No fumar.”
“No estacionar.”
Instructions
Giving step-by-step directions.
“Insertar la tarjeta.”
“Cerrar la puerta.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Infinitive
|
Presionar
|
|
Negative
|
No + Infinitive
|
No presionar
|
|
Instruction
|
Infinitive + Object
|
Cerrar la puerta
|
|
Prohibition
|
No + Infinitive + Object
|
No tocar el cristal
|
Formality Spectrum
Se ruega no fumar. (Public sign)
No fumar. (Public sign)
¡No fumes! (Public sign)
Ni se te ocurra fumar. (Public sign)
Infinitive Usage
Signs
- No fumar No smoking
Manuals
- Insertar Insert
Examples by Level
No fumar.
No smoking.
No tocar.
Do not touch.
No pasar.
Do not enter.
No estacionar.
No parking.
Insertar la moneda.
Insert the coin.
Cerrar la puerta.
Close the door.
No usar el móvil.
Do not use the mobile.
No correr en la piscina.
Do not run in the pool.
Mantener el área limpia.
Keep the area clean.
No tirar basura al suelo.
Do not throw trash on the ground.
Presionar el botón para ayuda.
Press the button for help.
No alimentar a los animales.
Do not feed the animals.
Se ruega no hacer ruido.
Please do not make noise.
No dejar objetos de valor en el coche.
Do not leave valuables in the car.
Añadir los ingredientes poco a poco.
Add the ingredients little by little.
No obstruir la salida de emergencia.
Do not obstruct the emergency exit.
Proceder a la evacuación inmediata.
Proceed to immediate evacuation.
No exceder el límite de velocidad.
Do not exceed the speed limit.
Abstenerse de realizar comentarios.
Refrain from making comments.
No manipular el equipo sin supervisión.
Do not manipulate the equipment without supervision.
Queda prohibido estacionar en esta zona.
Parking is prohibited in this area.
Se insta a los usuarios a no compartir sus credenciales.
Users are urged not to share their credentials.
No realizar cambios sin previa autorización.
Do not make changes without prior authorization.
No omitir ninguna instrucción del manual.
Do not omit any instruction from the manual.
Easily Confused
Learners often use the imperative when they should use the infinitive.
Learners try to use the subjunctive for commands.
Learners try to use the -ing form.
Common Mistakes
No fumas
No fumar
No fumen
No fumar
No fumarás
No fumar
No fumaría
No fumar
No a fumar
No fumar
No fumarlo
No fumar
No fumar la
No fumar
No se fumar
No fumar
No fumaría aquí
No fumar aquí
No fumaréis
No fumar
No se debe fumar
No fumar
Prohibido de fumar
Prohibido fumar
No se permite fumar
No fumar
No fumaría usted
No fumar
Sentence Patterns
No ___ el césped.
___ el botón para salir.
Favor de no ___ en la sala.
Queda prohibido ___ aquí.
Real World Usage
No estacionar.
Insertar la batería.
Añadir sal.
No compartir datos personales.
No interrumpir al entrevistador.
Confirmar el pedido.
Keep it short
Don't conjugate
Use for recipes
Regional variations
Smart Tips
Always use the infinitive.
Use the infinitive for steps.
Keep it impersonal.
Use the infinitive to avoid choosing between tú/usted.
Pronunciation
Infinitive endings
Ensure the final 'r' is clear but not overly emphasized.
Flat/Neutral
No fu-mar ↓
Signals a firm rule.
Memorize It
Mnemonic
Think of the infinitive as the 'Dictionary Form'—it's the neutral, universal label for the action.
Visual Association
Imagine a giant, glowing 'NO' sign in front of a verb. The verb is frozen in its base form, unable to change.
Rhyme
For signs on the wall, use the infinitive for all.
Story
You walk into a library. You see 'No hablar'. You go to the cafe. You see 'Pagar aquí'. You realize that in the public world, verbs don't need to change for you.
Word Web
Challenge
Go to a Spanish-language website or look at photos of Spanish streets and count how many infinitive signs you see in 5 minutes.
Cultural Notes
Signs are very direct. 'No fumar' is the standard.
Often uses 'Favor de no fumar' to be more polite.
Similar to Spain, very direct.
Derived from Latin infinitivus, meaning 'unlimited' or 'not finite'.
Conversation Starters
¿Qué dice el cartel?
¿Cómo se dice 'don't touch' en español?
Si escribes un manual, ¿qué forma verbal usas?
¿Por qué usamos el infinitivo en lugar del imperativo en señales?
Journal Prompts
Common Mistakes
Test Yourself
___ el césped.
Select the correct option.
Find and fix the mistake:
No hablas en la biblioteca.
¡No corras! (to a sign)
Match each item on the left with its pair on the right:
Para abrir, ___ el botón.
fumar / no / aquí
The infinitive is used for personal commands.
Score: /8
Practice Exercises
8 exercises___ el césped.
Select the correct option.
Find and fix the mistake:
No hablas en la biblioteca.
¡No corras! (to a sign)
No pasar - No tocar
Para abrir, ___ el botón.
fumar / no / aquí
The infinitive is used for personal commands.
Score: /8
Practice Bank
10 exercises___ {la|f} harina con {la|f} leche.
basura / No / tirar
Keep silent (Sign format)
Select the correct label:
No fumando en el ascensor.
Match the pairs:
___ con precaución.
Turn left (GPS)
Select the correct rule:
tocar / No / cables / los
Score: /10
FAQ (8)
It is impersonal and universal.
No, use the imperative.
It is neutral.
It becomes a direct command.
Yes, -ar, -er, -ir.
No, it is very consistent.
Yes, it is standard.
Only for instructions.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Infinitif
Placement of 'ne pas'.
Infinitiv
Word order.
Dictionary form
Particle usage.
Masdar
Root system.
Verb base
No conjugation at all.
Imperative
English uses the imperative form, not the infinitive.
Learning Path
Prerequisites
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