Questions & Answers about Los dioses griegos eran poderosos.
Why is eran used here instead of the preterite fueron?
Is eran a regular verb in the imperfect tense?
No, ser is one of only three irregular verbs in the imperfect tense (along with ir and ver). Eran is the 'they' form, coming from the conjugation pattern: era, eras, era, éramos, erais, eran.
Why do griegos and poderosos both end in -os?
Both are adjectives describing the masculine plural noun dioses. In Spanish, adjectives must match the gender and number of the noun they describe, which is why they both take the masculine plural -os ending.