Ser - Imperfect
Spanish: KS3, topic 17.2.6
Ser - To Be
'Ser' is one of the three verbs that are irregular in the imperfect tense. It has a completely irregular conjugation.

Era - I was, used to be

Eras - you were, used to be

Era - he/she was, used to be

Éramos - we were, used to be

Erais - you were, used to be

Eran - they were, used to be
Test yourself on Ser - Imperfect
What does 'era' NOT mean?
How do you say 'we used to be' in Spanish?