comprobar Negative Imperative Conjugation
comprobar — to check
Negative commands use the present subjunctive: no compruebes, no compruebe, no comprobemos, no comprobéis, no comprueben.
comprobar Negative Imperative Forms
When to Use the Negative Imperative
Use this to tell someone NOT to check something.
Notes on comprobar in the Negative Imperative
Follows the same stem-change rules as the present subjunctive (o > ue except for nosotros and vosotros).
Example Sentences
No compruebes el horno todavía.
Don't check the oven yet.
tú
No comprueben los resultados hasta el final.
Don't check the results until the end.
Common Mistakes
Mistake: Saying 'no comprueba' to a friend.
Correct: no compruebes
Why: Negative 'tú' commands must use the subjunctive ending (-es), not the indicative (-a).
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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.
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.