The Future Tense of mantener is used to express what you will keep or will maintain, for example, Mantendré mi promesa. (I will keep my promise.)

Mantener is an e to d stem-changing verb, meaning the e in the verb stem changes to a d in all forms except nosotros and vosotros.

Conjugations

Conjugations of Mantener (to maintain) in the Future Tense tense (Castilian Spanish):

Mantener generally means to maintain or keep something, but has several different meanings in the Future Tense, some of which might surprise you.

To maintain or keep: For example, Mantendré mi promesa de ayudarte. (I will keep my promise to help you.)

To support or sustain: For example, Mantendremos a nuestra familia con nuestro trabajo. (We will support our family with our work.)

To continue or persist: For example, Mantendré mi dieta aunque sea difícil. (I will continue my diet even though it’s difficult.)

To preserve or conserve: For example, Mantendremos las tradiciones de nuestros antepasados. (We will preserve the traditions of our ancestors.)

To assert or insist (colloquial): For example, Mantendrás lo que dijiste o te arrepentirás. (You will stand by what you said or you’ll regret it.)

To keep up or maintain a relationship (colloquial): For example, ¿Mantendrás el contacto conmigo después de mudarte? (Will you keep in touch with me after you move?)

Examples

Examples of Mantener in the Future Tense

Cuando vayamos de vacaciones, mantendré mi rutina de ejercicio. (When we go on vacation, I will maintain my exercise routine.)

Después de la boda, mantendremos nuestra tradición de cenar juntos los domingos. (After the wedding, we will maintain our tradition of having dinner together on Sundays.)

Aunque estés ocupado con el nuevo trabajo, mantendrás el contacto con tus viejos amigos, ¿verdad? (Even though you’ll be busy with the new job, you’ll keep in touch with your old friends, right?)

La empresa mantendrá sus altos estándares de calidad para seguir siendo competitiva. (The company will maintain its high quality standards to remain competitive.)

Cuando tengamos hijos, mantendremos vivas nuestras tradiciones culturales. (When we have children, we will keep our cultural traditions alive.)

Aunque cueste trabajo, mantendré una actitud positiva durante el proceso de recuperación. (Even though it will be difficult, I will maintain a positive attitude during the recovery process.)

Después de mudarnos, mantendrán su amistad a pesar de la distancia. (After we move, they will maintain their friendship despite the distance.)

Cuando estés de viaje, mantendrás un diario para recordar tus aventuras. (When you travel, you will keep a journal to remember your adventures.)

Aunque sea difícil al principio, mantendréis su compromiso con el proyecto. (Even though it will be difficult at first, you all will maintain your commitment to the project.)

Después del divorcio, mantendrán una buena relación por el bien de los niños. (After the divorce, they will maintain a good relationship for the children’s sake.)

Cuando te gradúes, mantendrás el contacto con tus compañeros de clase. (When you graduate, you will keep in touch with your classmates.)

Aunque cueste más, mantendremos nuestro estilo de vida saludable. (Even though it costs more, we will maintain our healthy lifestyle.)

Después de la remodelación, mantendrán el encanto original de la casa. (After the renovation, they will maintain the original charm of the house.)

Cuando empiecen las clases, mantendrás un horario estricto para estudiar. (When classes start, you will maintain a strict study schedule.)

Aunque sea un reto, mantendréis su compromiso con el medio ambiente. (Even though it will be a challenge, you all will maintain your commitment to the environment.)

Conjugations with English Translations

Conjugations of Mantener (to maintain) 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.