oscurecer Affirmative Imperative Conjugation
oscurecer — to get dark
The imperative uses 'oscurece' (tú) and 'oscurezca' (usted/ustedes).
oscurecer Affirmative Imperative Forms
When to Use the Affirmative Imperative
Since this verb often refers to the weather, commands are mostly used when telling someone to darken something, like a room or a painting.
Notes on oscurecer in the Affirmative Imperative
The 'tú' form is regular (oscurece), but the 'usted', 'nosotros', and 'ustedes' forms use the 'zc' from the subjunctive.
Example Sentences
Oscurece un poco más el fondo del cuadro.
Darken the background of the painting a bit more.
tú
Oscurezca la pantalla, por favor.
Darken the screen, please.
Common Mistakes
Mistake: oscurezce
Correct: oscurece
Why: The affirmative 'tú' command does not take the 'z'; it's just the same as the 'él/ella' present indicative.
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Related Tenses
Present
yo: oscurezco
Oscurecer follows the -cer/-cir pattern: the 'yo' form is oscurezco, while other forms are regular.
Preterite
yo: oscurecí
Oscurecer is completely regular in the preterite: oscurecí, oscureciste, oscureció, oscurecimos, oscurecisteis, oscurecieron.
Imperfect
yo: oscurecía
Oscurecer is regular in the imperfect: oscurecía, oscurecías, oscurecía, oscurecíamos, oscurecíais, oscurecían.
Future
yo: oscureceré
Oscurecer is regular in the future: oscureceré, oscurecerás, oscurecerá, oscureceremos, oscureceréis, oscurecerán.
Conditional
yo: oscurecería
Oscurecer is regular in the conditional: oscurecería, oscurecerías, oscurecería, oscureceríamos, oscureceríais, oscurecerían.
Present Subjunctive
yo: oscurezca
The present subjunctive uses the 'zc' stem for all forms: oscurezca, oscurezcas, oscurezca, oscurezcamos, oscurezcáis, oscurezcan.
Imperfect Subjunctive
yo: oscureciera
Oscurecer is regular in the imperfect subjunctive, using the 'ra' or 'se' forms: oscureciera, oscurecieras, etc.
Negative Imperative
yo: no oscurezcas
The negative imperative always uses the present subjunctive forms with 'no'.