Asegurar Conjugation in Spanish

The Spanish verb asegurar means to assure, to insure, and it is a verb you will use again and again once you know it. Asegurar means to assure or to insure, and the two senses share the idea of making something safe: you assure a person that everything is fine, you insure a house against fire, you secure a door, you make sure of a result. It takes que for the assurance, as in te aseguro que todo va bien. Like every Spanish verb, asegurar changes its ending for each person and tense, and this page gives you the complete picture: every tense, every person, the gerund and the past participle, all from the verified conjugation tables. For example, in the present tense you say aseguro a mi familia que todo va bien, and in the preterite you say aseguré a mis amigos que llegaré a tiempo. Work through the tables below, read the notes for each tense, and then test yourself with the examples, the common mistakes and the quiz at the end of the page.

Quick facts

  • Infinitive: asegurar
  • English: to assure, to insure
  • Verb type: regular -ar verb
  • Ending: -ar
  • Gerund: asegurando
  • Past participle: asegurado
  • Auxiliary verb: haber (all perfect tenses are formed with haber + asegurado)

Pronunciation is not listed on this page: the verified tables do not include IPA for asegurar, so no pronunciation is given rather than an invented one. Asegurar is fully regular: aseguré, aseguraba, aseguraré. To make sure of something, use asegurarse de que.

Full conjugation tables

Every form below comes from the verified conjugation tables for asegurar. The imperfect subjunctive is shown in its -ra forms; the -se forms use the same stem. For reflexive verbs, the pronoun column shows the reflexive pronoun that goes before each form.

Present indicative

Person Form
yo aseguro
tú aseguras
él/ella/Ud. asegura
nosotros/as aseguramos
vosotros/as aseguráis
ellos/ellas/Uds. aseguran

Preterite

Person Form
yo aseguré
tú aseguraste
él/ella/Ud. aseguró
nosotros/as aseguramos
vosotros/as asegurasteis
ellos/ellas/Uds. aseguraron

Imperfect

Person Form
yo aseguraba
tú asegurabas
él/ella/Ud. aseguraba
nosotros/as asegurábamos
vosotros/as asegurabais
ellos/ellas/Uds. aseguraban

Future

Person Form
yo aseguraré
tú asegurarás
él/ella/Ud. asegurará
nosotros/as aseguraremos
vosotros/as aseguraréis
ellos/ellas/Uds. asegurarán

Conditional

Person Form
yo aseguraría
tú asegurarías
él/ella/Ud. aseguraría
nosotros/as aseguraríamos
vosotros/as aseguraríais
ellos/ellas/Uds. asegurarían

Present perfect

Person Form
yo he asegurado
tú has asegurado
él/ella/Ud. ha asegurado
nosotros/as hemos asegurado
vosotros/as habéis asegurado
ellos/ellas/Uds. han asegurado

Pluperfect

Person Form
yo había asegurado
tú habías asegurado
él/ella/Ud. había asegurado
nosotros/as habíamos asegurado
vosotros/as habíais asegurado
ellos/ellas/Uds. habían asegurado

Future perfect

Person Form
yo habré asegurado
tú habrás asegurado
él/ella/Ud. habrá asegurado
nosotros/as habremos asegurado
vosotros/as habréis asegurado
ellos/ellas/Uds. habrán asegurado

Conditional perfect

Person Form
yo habría asegurado
tú habrías asegurado
él/ella/Ud. habría asegurado
nosotros/as habríamos asegurado
vosotros/as habríais asegurado
ellos/ellas/Uds. habrían asegurado

Present subjunctive

Person Form
yo asegure
tú asegures
él/ella/Ud. asegure
nosotros/as aseguremos
vosotros/as aseguréis
ellos/ellas/Uds. aseguren

Imperfect subjunctive (-ra)

Person Form
yo asegurara
tú aseguraras
él/ella/Ud. asegurara
nosotros/as aseguráramos
vosotros/as asegurarais
ellos/ellas/Uds. aseguraran

Imperative (affirmative)

Person Form
tú asegura
él/ella/Ud. asegure
nosotros/as aseguremos
vosotros/as asegurad
ellos/ellas/Uds. aseguren

Imperative (negative)

Person Form
tú asegures
él/ella/Ud. asegure
nosotros/as aseguremos
vosotros/as aseguréis
ellos/ellas/Uds. aseguren

Gerund and past participle

Form Spanish Use
Gerund asegurando with estar for the progressive: estoy asegurando
Past participle asegurado with haber for the perfect tenses: he asegurado

How to use each tense

Present indicative

Use the present for routines, general facts and what is happening right now. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the present looks like this in a real sentence: Aseguro a mi familia que todo va bien. Learn the present forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Preterite

Use the preterite for finished actions with a clear end, often with ayer, el año pasado or anoche. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the preterite looks like this in a real sentence: Ayer, aseguré que el trabajo estará listo. Learn the preterite forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Imperfect

Use the imperfect for background, habits and actions in progress in the past, often with de niño, antes or mientras. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the imperfect looks like this in a real sentence: De niño, aseguraba a mis amigos que llegaré a tiempo. Learn the imperfect forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Future

Use the future for plans, predictions and promises, often with mañana, el año que viene or pronto. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the future looks like this in a real sentence: Mañana, aseguraré al jefe que todo está bajo control. Learn the future forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Conditional

Use the conditional for polite requests, hypotheticals and what would happen, often with si clauses. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the conditional looks like this in a real sentence: Aseguraría a mi familia que todo va bien si pudiera. Learn the conditional forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Present perfect

Use the present perfect for recent actions and experiences, often with hoy, esta semana or ya. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the present perfect looks like this in a real sentence: Hoy, he asegurado que el trabajo estará listo. Learn the present perfect forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Pluperfect

Use the pluperfect when one past action happened before another past action. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the pluperfect looks like this in a real sentence: Había asegurado a mis amigos que llegaré a tiempo antes de salir. Learn the pluperfect forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Future perfect

Use the future perfect for something that will already be finished by a future time. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the future perfect looks like this in a real sentence: Para mañana, habré asegurado al jefe que todo está bajo control. Learn the future perfect forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Conditional perfect

Use the conditional perfect for what would have happened under different conditions. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the conditional perfect looks like this in a real sentence: Habría asegurado a mi familia que todo va bien con más tiempo. Learn the conditional perfect forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Present subjunctive

Use the present subjunctive after expressions of wish, doubt, emotion and hope, such as espero que or quiero que. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the present subjunctive looks like this in a real sentence: Espero que él asegure que el trabajo estará listo. Learn the present subjunctive forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Imperfect subjunctive (-ra)

Use the imperfect subjunctive after past wishes and in si clauses about the past, and note the -ra forms shown here; the -se forms use the same stem. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the imperfect subjunctive looks like this in a real sentence: Si él asegurara a mis amigos que llegaré a tiempo, todo cambiaría. Learn the imperfect subjunctive forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Imperative (affirmative)

Use the affirmative imperative for direct commands, instructions and invitations. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the affirmative imperative looks like this in a real sentence: ¡asegura al jefe que todo está bajo control! Learn the affirmative imperative forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Imperative (negative)

Use the negative imperative, always with no, to tell someone not to do something. For this verb the tense is regular, so the forms follow the standard endings for its verb class. For asegurar, the negative imperative looks like this in a real sentence: No asegures a mi familia que todo va bien. Learn the negative imperative forms in the table above alongside this example, and notice how the ending, not the stem, usually carries the meaning of the tense.

Example sentences

Ten natural sentences with asegurar, covering different tenses and persons. Each one uses a form from the tables above.

  1. Aseguro a mi familia que todo va bien. — I assure my family that everything is fine.
  2. Asegura que el trabajo estará listo. — He/she assures that the work will be ready.
  3. Ayer, aseguré a mis amigos que llegaré a tiempo. — Yesterday, I assured my friends that I will arrive on time.
  4. Antes, nosotros asegurábamos al jefe que todo está bajo control. — Before, we used to assure the boss that everything is under control.
  5. Mañana, tú asegurarás a mi familia que todo va bien. — Tomorrow, you will assure my family that everything is fine.
  6. Yo aseguraría que el trabajo estará listo si tuviera más tiempo. — I would assure that the work will be ready if I had more time.
  7. Él ha asegurado a mis amigos que llegaré a tiempo. — He has assured my friends that I will arrive on time.
  8. Espero que él asegure al jefe que todo está bajo control. — I hope he assures the boss that everything is under control.
  9. Yo ya había asegurado a mi familia que todo va bien antes de salir. — I had already assured my family that everything is fine before leaving.
  10. Ellos aseguraban que el trabajo estará listo cuando eran jóvenes. — They used to assure that the work will be ready when they were young.

Common mistakes

  1. Wrong: Yo asegura a mi familia que todo va bien. — Right: Yo aseguro a mi familia que todo va bien. — The person matters: asegura is the él/ella/Ud. form, while the yo form is aseguro. Using the third-person form with yo is one of the most common beginner errors.
  2. Wrong: Treating asegurar and garantizar as identical in every context. — Right: Asegurar means to assure, to insure, while garantizar means to guarantee something. — They overlap, but each has uses the other does not: asegurar fits sentences such as Aseguro a mi familia que todo va bien, while garantizar belongs in a different sentence. Check the meaning you want before choosing.
  3. Wrong: Yo soy asegurado que el trabajo estará listo. — Right: Yo he asegurado que el trabajo estará listo. — Spanish perfect tenses use haber, not ser: he asegurado, has asegurado, ha asegurado. Ser plus the participle makes a passive, not a perfect tense.
  4. Wrong: De niño, yo aseguré a mis amigos que llegaré a tiempo todos los días. — Right: De niño, yo aseguraba a mis amigos que llegaré a tiempo todos los días. — For a repeated habit in the past, use the imperfect (aseguraba), not the preterite. The preterite (aseguré) is for one finished action.

Quiz: test yourself

Ten questions on asegurar. Choose the right form, then check the answer key below.

  1. Complete the sentence: Yo ___ a mi familia que todo va bien. (present tense) A. aseguro B. aseguras C. asegura D. aseguramos

  2. Complete the sentence: Ayer, él ___ que el trabajo estará listo. (preterite) A. aseguré B. aseguraste C. aseguraron D. aseguró

  3. Complete the sentence: Antes, nosotros ___ a mis amigos que llegaré a tiempo. (imperfect) A. asegurabas B. aseguraban C. asegurábamos D. aseguraba

  4. Complete the sentence: Mañana, tú ___ al jefe que todo está bajo control. (future) A. aseguraremos B. asegurarás C. aseguraré D. asegurará

  5. Complete the sentence: Yo ___ a mi familia que todo va bien si pudiera. (conditional) A. aseguraría B. asegurarías C. asegurarían D. aseguro

  6. Complete the sentence: Espero que él ___ que el trabajo estará listo. (present subjunctive) A. asegures B. aseguremos C. aseguro D. asegure

  7. Complete the sentence: Si yo ___ a mis amigos que llegaré a tiempo, todo cambiaría. (imperfect subjunctive, -ra form) A. aseguráramos B. aseguro C. asegurara D. aseguraras

  8. Complete the sentence: Nosotros ___ al jefe que todo está bajo control. (present perfect) A. han asegurado B. hemos asegurado C. he asegurado D. has asegurado

  9. Complete the command: ¡___ a mi familia que todo va bien! (affirmative imperative, tú) A. asegura B. asegure C. aseguremos D. asegurad

  10. Which is the gerund of asegurar, used with estar for the progressive? A. asegurado B. aseguro C. aseguré D. asegurando

Answer key

  1. aseguro — The first-person present of asegurar is aseguro. The other options are the tú, él/ella and nosotros forms.
  2. aseguró — The third-person preterite of asegurar is aseguró, the form for a single finished action in the past.
  3. asegurábamos — The nosotros imperfect of asegurar is asegurábamos, used here for a repeated past habit.
  4. asegurarás — The second-person future of asegurar is asegurarás.
  5. aseguraría — The first-person conditional of asegurar is aseguraría, the form for what would happen.
  6. asegure — After espero que, the subjunctive is required: the third-person present subjunctive of asegurar is asegure.
  7. asegurara — The first-person imperfect subjunctive (-ra) of asegurar is asegurara.
  8. hemos asegurado — The nosotros present perfect of asegurar is hemos asegurado: hemos + asegurado.
  9. asegura — The affirmative tú imperative of asegurar is asegura.
  10. asegurando — The gerund of asegurar is asegurando: estoy asegurando. The participle asegurado is used with haber instead.

Frequently asked questions

What does asegurar mean in English?

Asegurar means to assure, to insure. It is used in everyday situations such as Aseguro a mi familia que todo va bien. The exact English wording depends on the context, but the core meaning stays the same across the tenses.

Is asegurar regular or irregular?

Asegurar is a fully regular -ar verb, so every tense follows the standard endings for its class. Once you know the regular pattern, you can produce every form on this page, including aseguro in the present and aseguré in the preterite.

What is the difference between asegurar and garantizar?

Asegurar means to assure, to insure, while garantizar means to guarantee something. They are easy to confuse because they appear in similar situations, but they are not interchangeable: use asegurar when you mean to assure, to insure, as in Aseguro a mi familia que todo va bien, and use garantizar for to guarantee something. When in doubt, check the object of the sentence — it usually shows which verb fits.

How do I say “I assure” in the past?

It depends on the kind of past. For one finished action, use the preterite: yo aseguré que el trabajo estará listo. For a repeated habit or background in the past, use the imperfect: yo aseguraba a mis amigos que llegaré a tiempo. For something that has just happened, use the present perfect: yo he asegurado que el trabajo estará listo.

How do I practise asegurar?

Start with the present tense table, then drill the preterite and the imperfect, since those two past tenses cause the most mistakes. Try the asegurar examples and quiz page for more sentences, and use the Spanish Verb Quiz to test the forms under pressure.

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