comprobar Imperfect Subjunctive Conjugation
comprobar — to check
The imperfect subjunctive is regular: comprobara, comprobaras, comprobara, comprobáramos, comprobarais, comprobaran.
comprobar Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this in 'if' clauses (hypotheticals) or when the main verb is in the past and triggers the subjunctive.
Notes on comprobar in the Imperfect Subjunctive
This tense is formed from the third-person plural of the preterite (comprobaron). It is regular.
Example Sentences
Si yo comprobara el billete, sabría si gané.
If I checked the ticket, I would know if I won.
yo
Me pidió que comprobara los niveles de agua.
He asked me to check the water levels.
él/ella/usted
Common Mistakes
Mistake: Using 'compruebara'.
Correct: comprobara
Why: The stem change o > ue never occurs in the imperfect 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.
Present Subjunctive
yo: compruebe
The present subjunctive follows the stem change (o > ue): compruebe, compruebes, compruebe, comprobemos, comprobéis, comprueben.
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.