oscurecer Negative Imperative Conjugation
oscurecer — to get dark
The negative imperative always uses the present subjunctive forms with 'no'.
oscurecer Negative Imperative Forms
When to Use the Negative Imperative
Use this to tell someone not to make something darker (like a photo or a room).
Notes on oscurecer in the Negative Imperative
All forms include the 'zc' because they are pulled directly from the present subjunctive.
Example Sentences
No oscurezcas tanto la habitación.
Don't darken the room so much.
tú
No oscurezcan la imagen todavía.
Don't darken the image yet.
Common Mistakes
Mistake: no oscureces
Correct: no oscurezcas
Why: Negative commands must use the subjunctive, not the indicative present.
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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.
Affirmative Imperative
yo: oscurece
The imperative uses 'oscurece' (tú) and 'oscurezca' (usted/ustedes).