-ar verb C1 · Advanced

Conjugate menguar in Spanish

to diminish, to wane

menguar is a regular -ar verb ranked #1280 among the most common Spanish verbs. For example: "La luna está menguando esta semana." (The moon is waning this week.). Use the tables below for full conjugation across all 7 tenses.

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

Pronoun Conjugation
yo menguo
menguas
él/ella/Ud. mengua
nosotros menguamos
vosotros menguáis
ellos/ellas/Uds. menguan
Example

El río mengua durante la sequía.

The river diminishes during the drought.

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

Pronoun Conjugation
yo mengüé
menguaste
él/ella/Ud. menguó
nosotros menguamos
vosotros menguasteis
ellos/ellas/Uds. menguaron
Example

Sus fuerzas menguaron después de la enfermedad.

His strength diminished after the illness.

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

Pronoun Conjugation
yo menguaba
menguabas
él/ella/Ud. menguaba
nosotros menguábamos
vosotros menguabais
ellos/ellas/Uds. menguaban
Example

Antes yo menguaba con frecuencia.

Before, I used to diminish, to wane often.

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

Pronoun Conjugation
yo menguaré
menguarás
él/ella/Ud. menguará
nosotros menguaremos
vosotros menguaréis
ellos/ellas/Uds. menguarán
Example

Mañana yo menguaré.

Tomorrow I will diminish, to wane.

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

Pronoun Conjugation
yo menguaría
menguarías
él/ella/Ud. menguaría
nosotros menguaríamos
vosotros menguaríais
ellos/ellas/Uds. menguarían
Example

Si pudiera, yo menguaría.

If I could, I would diminish, to wane.

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

Pronoun Conjugation
yo mengüe
mengües
él/ella/Ud. mengüe
nosotros menguemos
vosotros menguéis
ellos/ellas/Uds. mengüen
Example

Espero que tú mengües.

I hope that you diminish, to wane.

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

Pronoun Conjugation
yo -
mengua
él/ella/Ud. mengüe
nosotros menguemos
vosotros menguad
ellos/ellas/Uds. mengüen
Example

El río mengua durante la sequía.

The river diminishes during the drought.

Test yourself

Type the correct conjugation for each prompt.

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Example sentences

Common phrases with menguar

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