Verbos modales in Spanish — Modal VerbsA2

Poder expresses ability, possibility, and permission in the present. Its form changes like an irregular verb: puedo, puedes, puede, podemos, podéis, pueden. With an action, it is followed by an infinitive: puedo estudiar, puedes entrar, podemos salir. To talk about ability, it describes what a person manages to do: Ella puede correr cinco kilómetros. For possibility, it indicates that something is possible in the situation: Puede llover esta tarde. For permission, it appears in questions and short answers: ¿Puedo pasar? Sí, puedes. It is also used with negation for prohibition or lack of possibility: No puedo ir hoy. Compared with Regular Verbs, poder does not follow a regular pattern in the present, and compared with Irregular Verbs, it shows its own very frequent changes.

Deber serves to express obligation, recommendation, and probability. In the present, its form is regular: debo, debes, debe, debemos, debéis, deben. With an infinitive, it marks a mild obligation or a recommendation: debes descansar, debemos llamar antes. In a medical or academic context, it sounds like advice: Debe beber más agua. When it expresses probability, it does not express an order but rather a deduction: Debe de estar en casa or Debe estar en casa. The idea depends on the context and tone. In a formal conversation, deber can sound more precise and stronger than other modals. Its basic combination is deber + infinitivo, as occurs with other Verbal Infinitives.

Obligación fuerte con tener que

Subject	Infinitive	Conjugation
yo	deber	debo
tú	deber	debes
él	deber	debe
nosotros	deber	debemos
vosotros	deber	debéis
ellos	deber	deben

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Tener que + infinitivo expresses a strong, concrete, and necessary obligation. The structure does not change: only tener is conjugated. In the present: tengo que ir, tienes que estudiar, tenemos que salir. The main verb always remains in the infinitive. It is used when the obligation comes from a real situation, a rule, or a practical need: Tengo que pagar hoy, Tienes que llevar casco. In the negative, it denies the obligation: No tengo que trabajar mañana means that this obligation does not exist. The strength of this construction brings it closer to actual necessity than to the simple recommendation that deber can convey. That is why it often appears alongside Auxiliary Verbs and other verbal support structures.

Obligación impersonal con hay que

Idea
Se usa hay que cuando la obligación es general y no tiene sujeto explícito.
La forma es siempre impersonal y no cambia con la persona.
Sirve mucho para normas, consejos o avisos públicos.

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Hay que + infinitivo expresses a general obligation without saying who must carry it out. The verb hay always appears in the third-person singular because the expression is impersonal. It is used for rules, general advice, and actions necessary for anyone in that situation: Hay que apagar el móvil, Hay que llegar temprano, Hay que respetar las señales. It does not identify a specific subject. That is why it sounds natural in instructions, notices, and impersonal recommendations. Compared with tengo que or debes, here the obligation does not fall on a specific person, but on anyone who is in the situation. The verbal basis remains hay que + infinitivo, just like other constructions with Verbal Infinitives.

Presente de querer con valor modal

Idea
Se usa hay que cuando la obligación es general y no tiene sujeto explícito.
La forma es siempre impersonal y no cambia con la persona.
Sirve mucho para normas, consejos o avisos públicos.

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Querer + infinitivo expresses desire, intention, or will. In the present, its most commonly used forms are quiero, quieres, quiere, queremos, queréis, quieren. With an infinitive, it indicates what someone wants to do: quiero comer, queremos viajar, quieren aprender español. It can also be used with a polite tone in questions and requests: ¿Quieres ayudarme?, ¿Quiere un café?. In that case, it does not always describe a real desire; many times it functions as a kind way to offer or invite. The structure keeps the following verb in the infinitive and fits with common intention constructions in Spanish. To understand how it works, it is useful to relate it to other Auxiliary Verbs and to the use of infinitives already seen in Verbal Infinitives.

Presente de saber para habilidad y conocimiento

Subject	Infinitive	Conjugation
yo	querer	quiero
tú	querer	quieres
él	querer	quiere
nosotros	querer	queremos
vosotros	querer	queréis
ellos	querer	quieren

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Saber expresses knowledge and learned ability. In the present, it is conjugated as sé, sabes, sabe, sabemos, sabéis, saben. With a fact or piece of data, it means knowing information: Sé la respuesta, Sabemos dónde vive. With an infinitive, it indicates an acquired skill: Sé nadar, sabe conducir. This difference is central. Saber is not used for a physical or circumstantial possibility like poder; it is used for a learned ability or for possessing a piece of information. Nor is it equivalent to conocer, which refers to people, places, or experiences. Saying sé hablar francés indicates ability, whereas conozco París indicates familiarity with the place. The irregular verb form connects with other Irregular Verbs, but its everyday use is very stable.

Presente de soler para hábitos habituales

Subject	Infinitive	Conjugation
yo	saber	sé
tú	saber	sabes
él	saber	sabe
nosotros	saber	sabemos
vosotros	saber	sabéis
ellos	saber	saben

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Soler + infinitivo talks about habits, customs, and actions that normally occur. In the present, the most common forms are suelo, sueles, suele, solemos, soléis, suelen. The structure always takes an infinitive: suelo desayunar temprano, suele llover en otoño, solemos cenar juntos. It does not indicate a one-time action, but rather a habitual repetition or tendency. That is why it appears with schedules, routines, and typical behaviors. It can also describe what happens almost always: Ese tren suele llegar tarde. In everyday conversation, soler adds a more natural and frequent nuance than simple repetition. Its fixed combination with an infinitive places it alongside other basic constructions with Verbal Infinitives.

Necesidad con necesitar

Subject	Infinitive	Conjugation
yo	soler	suelo
tú	soler	sueles
él	soler	suele
nosotros	soler	solemos
vosotros	soler	soléis
ellos	soler	suelen

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Necesitar + infinitivo expresses the need, lack, or urgency to do something. The form is conjugated regularly: necesito, necesitas, necesita, necesitamos, necesitáis, necesitan. The infinitive follows: necesito dormir, necesitamos salir ahora, necesitas llamar al médico. It is used when an action is essential to resolve a situation or meet a need. In a more concrete version, it may refer to objects or resources: Necesito dinero, Necesitamos ayuda. When the main verb is an action, the infinitive presents what needs to be done. The structure is direct and very common in daily life, especially alongside Auxiliary Verbs and other patterns of immediate action.

Deber de para suposición y cortesía

Idea
Se usa necesitar para expresar falta o necesidad de hacer algo.
Después de necesitar va un infinitivo cuando hablamos de acción.
Puede sonar más práctico que tener que cuando la urgencia es personal.

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Deber de + infinitivo does not express obligation. It expresses supposition or probability. In the present, it is used to deduce something from visible clues or the context: Debe de estar cansado, Deben de ser las ocho, Debe de llover fuera. The presence of de changes the verb's meaning. Without de, deber usually marks obligation or recommendation; with de, it marks a probable conclusion. In many contexts, especially in everyday speech, the form with de is perceived as clearer when the speaker wants to show that they are making a deduction. The structure remains deber de + infinitivo, and it keeps the infinitive as a necessary part of the construction. This difference is useful for avoiding confusion between obligation and supposition.

Combinación de modales con infinitivo

Usage	Explanation
Suposición sobre una situación	Se usa deber de para expresar una probabilidad o conjetura.
Cálculo mental	Sirve cuando el hablante hace una estimación razonable.
Recomendación suave	En algunos contextos, deber de suena más suave que una orden directa.

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Modal verbs are usually followed by an infinitive and form the basis of many complete sentences. The general structure is subject + modal + infinitive: yo puedo salir, tú debes estudiar, ella quiere descansar, nosotros solemos caminar. In the negative, no goes before the modal: no puedo ir, no debes correr, no quiero hablar, no solemos tardar. In questions, the modal appears at the beginning of the sentence or after the interrogative pronoun: ¿Puedes venir?, ¿Debemos esperar?, ¿Quieres café?, ¿Sueles levantarte temprano?. When the main verb is reflexive, the pronoun goes before the modal or is attached to the infinitive: me quiero ir or quiero irme, se puede sentar or puede sentarse. With Verbal Gerunds and other constructions of action in progress, the modal usually accompanies a basic infinitive, not a gerund, except in specific periphrastic constructions.

Regional usage nuances

Idea
El verbo modal se conjuga y el verbo principal queda en infinitivo.
En la negativa, no va delante del modal.
En preguntas, el modal suele ir al principio de la oración.
Dos modales no suelen ir juntos en la misma estructura básica.

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In Spain and the Americas, some modals change in tone more than in form. Poder is common everywhere, but in requests ¿Puedes... ? sounds more frequent in everyday speech, while in very formal contexts ¿Podría... ? may be preferred as a courtesy. Deber and tener que are used on both sides, although tener que usually sounds more direct in daily conversation. Hay que appears very naturally in instructions and rules throughout the Spanish-speaking world. Soler is very common in Spain and is also understood in the Americas, but in some areas it is used less in spontaneous conversation. In daily life, these differences affect the tone: more neutral, more direct, or more courteous. The basic value of each structure remains, but the choice changes according to the relationship between speakers, the degree of formality, and the regional variety.