endurecer Imperfect Conjugation
endurecer — to harden
The imperfect of endurecer is regular: endurecía, endurecías, endurecía, endurecíamos, endurecíais, endurecían.
endurecer Imperfect Forms
When to Use the Imperfect
Use the imperfect to describe a process of hardening that was ongoing or to describe how someone used to be (e.g., 'he was becoming tougher').
Notes on endurecer in the Imperfect
Endurecer is regular in the imperfect. All forms carry a written accent on the 'í'.
Example Sentences
Antes, el profesor no endurecía tanto los requisitos.
Before, the teacher didn't use to make the requirements so tough.
él/ella/usted
Sentíamos cómo se endurecían nuestras manos por el trabajo.
We felt how our hands were hardening from the work.
ellos/ellas/ustedes
Common Mistakes
Mistake: endurecia
Correct: endurecía
Why: In the imperfect for -er verbs, the 'i' must always have an accent mark.
Master Spanish verbs in context
Memorizing tables only gets you so far. Read 200+ illustrated and narrated Spanish stories to see verbs like 'endurecer' used naturally — in the tenses you're learning.
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.
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.
Present Subjunctive
yo: endurezca
The present subjunctive of endurecer uses the 'zc' stem: endurezca, endurezcas, endurezca, etc.
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.