comprobar Present Subjunctive Conjugation
comprobar — to check
The present subjunctive follows the stem change (o > ue): compruebe, compruebes, compruebe, comprobemos, comprobéis, comprueben.
comprobar Present Subjunctive Forms
When to Use the Present Subjunctive
Use this after expressions of doubt, desire, or impersonal phrases like 'Es importante que...' (It's important that...).
Notes on comprobar in the Present Subjunctive
Like the present indicative, this tense features the o > ue stem change in all forms except nosotros and vosotros.
Example Sentences
Espero que compruebes el horario.
I hope you check the schedule.
tú
Es necesario que nosotros comprobemos la dirección.
It is necessary that we check the address.
nosotros
Common Mistakes
Mistake: Using 'compruebemos' for nosotros.
Correct: comprobemos
Why: For -ar verbs, the stem change is dropped in the nosotros/vosotros forms of the subjunctive.
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Related Tenses
Present
yo: compruebo
Comprobar is a stem-changing verb (o > ue) in all forms except nosotros and vosotros.
Preterite
yo: comprobé
The preterite of comprobar is regular: comprobé, comprobaste, comprobó, comprobamos, comprobasteis, comprobaron.
Imperfect
yo: comprobaba
The imperfect of comprobar is regular: comprobaba, comprobabas, comprobaba, comprobábamos, comprobabais, comprobaban.
Future
yo: comprobaré
The future of comprobar is regular: comprobaré, comprobarás, comprobará, comprobaremos, comprobaréis, comprobarán.
Conditional
yo: comprobaría
The conditional of comprobar is regular: comprobaría, comprobarías, comprobaría, comprobaríamos, comprobaríais, comprobarían.
Imperfect Subjunctive
yo: comprobara
The imperfect subjunctive is regular: comprobara, comprobaras, comprobara, comprobáramos, comprobarais, comprobaran.
Affirmative Imperative
yo: comprueba
Use 'comprueba' (tú) or 'compruebe' (usted) to tell someone to check something.
Negative Imperative
yo: no compruebes
Negative commands use the present subjunctive: no compruebes, no compruebe, no comprobemos, no comprobéis, no comprueben.