comprobar Imperfect Conjugation
comprobar — to check
The imperfect of comprobar is regular: comprobaba, comprobabas, comprobaba, comprobábamos, comprobabais, comprobaban.
comprobar Imperfect Forms
When to Use the Imperfect
Use the imperfect for repeated past checks, background information, or to say you 'were checking' something when something else happened.
Notes on comprobar in the Imperfect
Comprobar is a regular -ar verb in the imperfect. No stem changes occur.
Example Sentences
De niño, siempre comprobaba si había monstruos bajo la cama.
As a child, I always checked if there were monsters under the bed.
yo
Mientras el técnico comprobaba el motor, nosotros esperábamos.
While the technician was checking the engine, we were waiting.
él/ella/usted
Common Mistakes
Mistake: Forgetting the accent on 'comprobábamos'.
Correct: comprobábamos
Why: In the imperfect, the nosotros form of -ar verbs always requires an accent on the first 'a' of the ending.
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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.
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.
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.