-ar verb irregular · stem-changing o>ue B1 · Intermediate

Conjugate comprobar in Spanish

to verify / to check

comprobar is an irregular -ar verb ranked #435 among the most common Spanish verbs. For example: "Necesito comprobar esto." (I need to verify / to check this.). Use the tables below for full conjugation across all 7 tenses.

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⚡ Irregular verb — comprobar (stem-changing o>ue) does not follow standard -ar patterns. Pay close attention to the stems in each tense.

Describes current actions, habits, and general truths. The most frequently used tense — master it first.

Pronoun Conjugation
yo compruebo *
compruebas *
él/ella/Ud. comprueba *
nosotros comprobamos
vosotros comprobáis
ellos/ellas/Uds. comprueban *
Example

Yo compruebo todos los días.

I verify / to check every day.

Describes completed past actions with a clear start and end. Key signals: ayer, el lunes pasado, de repente.

Pronoun Conjugation
yo comprobé
comprobaste
él/ella/Ud. comprobó
nosotros comprobamos
vosotros comprobasteis
ellos/ellas/Uds. comprobaron
Example

Ayer yo comprobé.

Yesterday I verify / to check.

Describes habitual past actions, background context, and ongoing states. Key signals: siempre, normalmente, cuando era niño.

Pronoun Conjugation
yo comprobaba
comprobabas
él/ella/Ud. comprobaba
nosotros comprobábamos
vosotros comprobabais
ellos/ellas/Uds. comprobaban
Example

Antes yo comprobaba con frecuencia.

Before, I used to verify / to check often.

Describes future events and predictions. In everyday speech, ir a + infinitive is often preferred for planned events.

Pronoun Conjugation
yo comprobaré
comprobarás
él/ella/Ud. comprobará
nosotros comprobaremos
vosotros comprobaréis
ellos/ellas/Uds. comprobarán
Example

Mañana yo comprobaré.

Tomorrow I will verify / to check.

Expresses what would happen under certain conditions — equivalent to "would" in English. Also used for polite requests.

Pronoun Conjugation
yo comprobaría
comprobarías
él/ella/Ud. comprobaría
nosotros comprobaríamos
vosotros comprobaríais
ellos/ellas/Uds. comprobarían
Example

Si pudiera, yo comprobaría.

If I could, I would verify / to check.

Used in clauses expressing wishes, doubt, emotion, or uncertainty — typically after que. Triggers: querer, esperar, dudar, ojalá.

Pronoun Conjugation
yo compruebe *
compruebes *
él/ella/Ud. compruebe *
nosotros comprobemos
vosotros comprobéis
ellos/ellas/Uds. comprueben *
Example

Espero que tú compruebes.

I hope that you verify / to check.

Used to give commands and direct requests. Affirmative and negative forms differ significantly in Spanish.

Pronoun Conjugation
yo -
comproba
él/ella/Ud. comprobe
nosotros comprobemos
vosotros comprobad
ellos/ellas/Uds. comproben
Example

¡Comproba!

Verify / to check!

Test yourself

Type the correct conjugation for each prompt.

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Example sentences

Common phrases with comprobar

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