Imperfect Subjunctive: Irregular 'ER'
Spanish: Cambridge International GCSE, topic 10.7.4
Irregular ER Verbs
ER verbs that are irregular in the 'ellos/ellas' form of the preterite tense are irregular in the imperfect subjunctive. They have the same irregular stem as they have in the 'ellos/ellas' form of the preterite tense. Here are some examples:

'Caer'
- Cayera/cayese - I fell.
- Cayeras/cayeses - you fell.
- Cayera/cayese - he/she fell / you fell (formal).
- Cayéramos/cayésemos - we fell.
- Cayerais/cayeseis - you fell (plural).
- Cayeran/cayesen - they fell / you fell (formal plural)

'Leer'
- Leyera/leyese - I read.
- Leyeras/leyeses - you read.
- Leyera/leyese - he/she read / you read (formal).
- Leyéramos/leyésemos - we read.
- Leyerais/leyeseis - you read (plural).
- Leyeran/leyesen - they read / you read (formal plural).
Test yourself on Imperfect Subjunctive: Irregular 'ER'
How do you say 'we fell' in the imperfect subjunctive in Spanish?