
reforzar Present Conjugation
reforzar — to reinforce
Reforzar follows an o-ue stem change in all forms except nosotros and vosotros.
reforzar Present Forms
When to Use the Present
Use the present tense to talk about current habits, strengthening a structure, or reinforcing an idea in a conversation happening now.
Notes on reforzar in the Present
This is a 'boot verb' where the 'o' changes to 'ue' in the stem (refuerzo, refuerzas) but stays 'o' for nosotros and vosotros.
Example Sentences
Siempre refuerzo mis conocimientos con ejercicios.
I always reinforce my knowledge with exercises.
yo
El equipo refuerza la defensa esta temporada.
The team is reinforcing the defense this season.
él/ella/usted
Nosotros reforzamos la estructura del edificio.
We are reinforcing the structure of the building.
nosotros
Ellos refuerzan su amistad pasando tiempo juntos.
They reinforce their friendship by spending time together.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using 'refuerzamos' for the nosotros form.
Correct: reforzamos
Why: The o-ue stem change never applies to the nosotros or vosotros forms in the present indicative.
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Related Tenses
Preterite
yo: reforcé
Reforzar has a spelling change in the 'yo' form (reforcé) to keep the 'th/s' sound.
Imperfect
yo: reforzaba
Reforzar is completely regular in the imperfect: reforzaba, reforzabas, reforzaba...
Future
yo: reforzaré
Reforzar is regular in the future; just add endings to the full infinitive.
Conditional
yo: reforzaría
The conditional uses the infinitive 'reforzar' plus endings like -ía, -ías, -ía.
Present Subjunctive
yo: refuerce
The present subjunctive features the o-ue stem change and the z-c spelling change.
Imperfect Subjunctive
yo: reforzara
Formed from the 'reforzaron' stem: reforzara, reforzaras, reforzara...
Affirmative Imperative
yo: refuerza
Give commands using 'refuerza' (tú) or 'refuercen' (ustedes).
Negative Imperative
yo: no refuerces
All negative commands for reforzar use the present subjunctive forms.