endurecer Present Subjunctive Conjugation
endurecer — to harden
The present subjunctive of endurecer uses the 'zc' stem: endurezca, endurezcas, endurezca, etc.
endurecer Present Subjunctive Forms
When to Use the Present Subjunctive
Use this when expressing a wish, doubt, or command that something becomes hard (e.g., 'I want the clay to harden').
Notes on endurecer in the Present Subjunctive
Because the 'yo' form of the present indicative is 'endurezco', that 'zc' carries through the entire present subjunctive.
Example Sentences
Espero que no endurezcan las condiciones del contrato.
I hope they don't toughen the contract conditions.
ellos/ellas/ustedes
Es necesario que la mezcla se endurezca lentamente.
It is necessary that the mixture hardens slowly.
él/ella/usted
Common Mistakes
Mistake: Que se endureca.
Correct: Que se endurezca.
Why: Without the 'z', the 'c' before 'a' would sound like a 'k' (en-du-re-ka), which is incorrect for this verb.
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Related Tenses
Present
yo: endurezco
The present tense of endurecer is irregular in the 'yo' form: endurezco.
Preterite
yo: endurecí
The preterite of endurecer is regular: endurecí, endureciste, endureció, endurecimos, endurecisteis, endurecieron.
Imperfect
yo: endurecía
The imperfect of endurecer is regular: endurecía, endurecías, endurecía, endurecíamos, endurecíais, endurecían.
Future
yo: endureceré
The future of endurecer is regular: endureceré, endurecerás, endurecerá, endureceremos, endureceréis, endurecerán.
Conditional
yo: endurecería
The conditional of endurecer is regular: endurecería, endurecerías, endurecería, endureceríamos, endureceríais, endurecerían.
Imperfect Subjunctive
yo: endureciera
The imperfect subjunctive of endurecer is formed from the third-person plural preterite: endureciera.
Affirmative Imperative
yo: endurece
The imperative of endurecer uses 'endurece' (tú) and 'endurezca' (usted).
Negative Imperative
yo: no endurezcas
The negative imperative always uses the present subjunctive forms: no endurezcas, no endurezca.