Inklingo
A wooden beam being supported by a thick metal plate and several strong bolts.

reforzar

to reinforce

Complete conjugation tables and interactive practice exercises. This is a stem-changing (o-ue) -ar verb.

The Spanish verb reforzar means to reinforce.

Present tense:

yorefuerzo
refuerzas
él/ella/ustedrefuerza
nosotrosreforzamos
vosotrosreforzáis
ellos/ellas/ustedesrefuerzan

Complete Conjugation Tables

Reference all tenses and moods

🔄 Conjugations

subjunctive

imperfect

ellos/ellas/ustedesreforzaran
yoreforzara
reforzaras
vosotrosreforzarais
nosotrosreforzáramos
él/ella/ustedreforzara

Formed from the 'reforzaron' stem: reforzara, reforzaras, reforzara...

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present

ellos/ellas/ustedesrefuercen
yorefuerce
refuerces
vosotrosreforcéis
nosotrosreforcemos
él/ella/ustedrefuerce

The present subjunctive features the o-ue stem change and the z-c spelling change.

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imperative

negative

no refuerces
vosotrosno reforcéis
ustedesno refuercen
nosotrosno reforcemos
ustedno refuerce

All negative commands for reforzar use the present subjunctive forms.

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affirmative

refuerza
vosotrosreforzad
ustedesrefuercen
nosotrosreforcemos
ustedrefuerce

Give commands using 'refuerza' (tú) or 'refuercen' (ustedes).

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indicative

conditional

ellos/ellas/ustedesreforzarían
yoreforzaría
reforzarías
vosotrosreforzaríais
nosotrosreforzaríamos
él/ella/ustedreforzaría

The conditional uses the infinitive 'reforzar' plus endings like -ía, -ías, -ía.

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preterite

ellos/ellas/ustedesreforzaron
yoreforcé
reforzaste
vosotrosreforzasteis
nosotrosreforzamos
él/ella/ustedreforzó

Reforzar has a spelling change in the 'yo' form (reforcé) to keep the 'th/s' sound.

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imperfect

ellos/ellas/ustedesreforzaban
yoreforzaba
reforzabas
vosotrosreforzabais
nosotrosreforzábamos
él/ella/ustedreforzaba

Reforzar is completely regular in the imperfect: reforzaba, reforzabas, reforzaba...

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present

ellos/ellas/ustedesrefuerzan
yorefuerzo
refuerzas
vosotrosreforzáis
nosotrosreforzamos
él/ella/ustedrefuerza

Reforzar follows an o-ue stem change in all forms except nosotros and vosotros.

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future

ellos/ellas/ustedesreforzarán
yoreforzaré
reforzarás
vosotrosreforzaréis
nosotrosreforzaremos
él/ella/ustedreforzará

Reforzar is regular in the future; just add endings to the full infinitive.

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Practice Conjugations

Test your knowledge with interactive exercises

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Take reforzar from tables to real Spanish

Conjugation tables are the start. Read 200+ illustrated and narrated Spanish stories to see 'reforzar' in action across real sentences — and build the instinct that native speakers have.