Use the imperfect to describe what used to happen or what was habitually done in the past. This is the "habitual past" meaning of "would" in English — "When I was young, we would eat together every Sunday."

Signal words: de niñocuando era jovenantessiempreen aquella épocatodos los veranos
Pronoun Imperfect
yo enfurecía
enfurecías
él/ella/Ud. enfurecía
nosotros enfurecíamos
vosotros enfurecíais
ellos/ellas/Uds. enfurecían

Use the conditional for hypothetical situations — what would happen under certain conditions. This appears in if-clauses and polite requests. "Would you like some water?" = "¿Te gustaría algo de agua?"

Signal words: si + imperfect subjunctiveme gustaríaquisieraen tu lugar yodeberíasi pudiera
Pronoun Conditional
yo enfurecería
enfurecerías
él/ella/Ud. enfurecería
nosotros enfureceríamos
vosotros enfureceríais
ellos/ellas/Uds. enfurecerían
Key contrast

"De niño, hablaba con mi abuelo" (imperfect — used to, habitual past) vs "Hablaría con él si pudiera" (conditional — would, hypothetical). English "would" maps to imperfect for habitual past, conditional for hypotheticals.

Imperfect vs Conditional: common questions

Why do both imperfect and conditional translate as "would" in English?

English "would" covers two distinct concepts: habitual past ("we would walk every day") and hypothetical ("I would go if I could"). Spanish uses imperfect for the first and conditional for the second.

Can I use the imperfect instead of the conditional for polite requests?

Yes — both are used for polite requests in Spanish. "Quería un café" (imperfect) and "Querría un café" (conditional) are both acceptable polite ways to order. The imperfect is more common in everyday speech.

How do imperfect and conditional endings compare?

They use the same endings (-a, -as, -a, -amos, -ais, -an) but applied to different stems. The imperfect uses the infinitive stem with -ba- (-ar verbs) or the same endings (-er/-ir). The conditional always attaches to the full infinitive (or irregular stem).

Practise both tenses with enfurecer using spaced repetition.