The Future Tense of deber is used to express an obligation, duty or probability that will occur in the future. For example, Deberé estudiar más para aprobar el examen. (I will have to study more to pass the exam.)

Deber is a regular -er verb, so its Future Tense conjugations follow the regular pattern by dropping the infinitive ending and adding the corresponding future tense endings.

Conjugations

Conjugations of Deber (to owe/should) in the Future Tense tense (Castilian Spanish):

Deber generally means “to owe” or “must”, but has several different meanings in the Future Tense, some of which might surprise you.

Obligation: For example, Deberé estudiar más para aprobar el examen. (I will have to study more to pass the exam.)

Probability: For example, Deberá llover mañana según el pronóstico. (It will probably rain tomorrow according to the forecast.)

Assumption: For example, Deberán estar en casa a esta hora. (They must be home at this time.)

Recommendation: For example, Deberás tomar un descanso, has trabajado mucho. (You should take a break, you’ve worked a lot.)

Debt (colloquial): For example, ¿Cuánto deberé después de pagar la cuenta? (How much will I owe after paying the bill?)

Obligation to repay (colloquial): For example, Te deberé un favor después de esto. (I will owe you one after this.)

Examples

Examples of Deber in the Future Tense

Si no terminas tu tarea, deberás quedarte después de clase. (If you don’t finish your homework, you will have to stay after class.)

Aunque no quieras ir, deberás asistir a la reunión familiar. (Even if you don’t want to go, you will have to attend the family gathering.)

Para viajar a ese país, deberás obtener una visa. (To travel to that country, you will have to obtain a visa.)

Si quieres aprobar el examen, deberás estudiar mucho. (If you want to pass the exam, you will have to study a lot.)

Cuando llegues a la ciudad, deberás visitar los museos más famosos. (When you arrive in the city, you will have to visit the most famous museums.)

Para conseguir ese trabajo, deberás tener experiencia previa. (To get that job, you will have to have previous experience.)

Si quieres mejorar tu salud, deberás hacer ejercicio regularmente. (If you want to improve your health, you will have to exercise regularly.)

Cuando tengas hijos, deberás enseñarles buenos valores. (When you have children, you will have to teach them good values.)

Para ser un buen líder, deberás inspirar a tu equipo. (To be a good leader, you will have to inspire your team.)

Si quieres aprender un idioma nuevo, deberás practicar todos los días. (If you want to learn a new language, you will have to practice every day.)

Cuando llegues a la fiesta, deberás saludar a todos los invitados. (When you arrive at the party, you will have to greet all the guests.)

Para tener éxito en tu negocio, deberás trabajar duro y ser persistente. (To be successful in your business, you will have to work hard and be persistent.)

Si quieres viajar al extranjero, deberás ahorrar dinero para los gastos. (If you want to travel abroad, you will have to save money for expenses.)

Cuando seas mayor, deberás planificar tu jubilación. (When you are older, you will have to plan for your retirement.)

Para mantener una relación sana, deberás comunicarte abiertamente con tu pareja. (To maintain a healthy relationship, you will have to communicate openly with your partner.)

Conjugations with English Translations

Conjugations of Deber (to owe/should) in the Future Tense tense (Castilian Spanish) with English Translations:

This post covers Castilian Spanish. For Latin American Spanish, click here

Synonyms

The Future tense is also known as the Simple Future, Future Simple, Future Tense, Future Indicative, or Will Future in English, and as Futuro Simple, Futuro Imperfecto, Tiempo Futuro, Futuro de Indicativo, or Indicativo Futuro in Spanish.