reforzar Present Subjunctive Conjugation
reforzar — to reinforce
The present subjunctive features the o-ue stem change and the z-c spelling change.
reforzar Present Subjunctive Forms
When to Use the Present Subjunctive
Use after expressions of doubt, desire, or necessity, such as 'Es necesario que...'.
Notes on reforzar in the Present Subjunctive
This tense combines the stem change (refuerce) and the z-to-c spelling change in all forms.
Example Sentences
Espero que tú refuerces tu vocabulario.
I hope that you reinforce your vocabulary.
tú
Es necesario que el jefe refuerce el mensaje.
It is necessary that the boss reinforces the message.
él/ella/usted
Dudo que ellos refuercen el personal ahora.
I doubt they will reinforce the staff now.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using 'z' instead of 'c', like 'refuerze'.
Correct: refuerce
Why: In the subjunctive, the 'e' ending forces the 'z' in the stem to change to a 'c'.
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Related Tenses
Present
yo: refuerzo
Reforzar follows an o-ue stem change in all forms except nosotros and vosotros.
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.
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.