Imperfect Subjunctive: Irregular 'IR'
Spanish: Cambridge International GCSE, topic 10.7.7
Irregular IR Verbs
IR 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:

'Pedir'
- Pidiera/pidiese - I asked for.
- Pidieras/pidieses - you asked for.
- Pidiera/pidiese - he/she asked for / you asked for (formal).
- Pidiéramos/pidiésemos - we asked for.
- Pidierais/pidieseis - you asked for (plural).
- Pidieran/pidiesen - they asked for / you asked for (formal plural).

'Conducir'
- Condujera/condujese - I drove.
- Condujeras/condujeses - you drove.
- Condujera/condujese - he/she drove / you drove (formal).
- Condujéramos/condujésemos - we drove.
- Condujerais/condujeseis - you drove (plural).
- Condujeran/condujesen - they drove / you drove (formal plural).

'Dormir'
- Durmiera/durmiese - I slept.
- Durmieras/durmieses - you slept.
- Durmiera/durmiese - he/she slept / you slept (formal).
- Durmiéramos/durmiésemos - we slept.
- Durmierais/durmieseis - you slept (plural).
- Durmieran/durmiesen - they slept / you slept (formal plural).

'Oír'
- Oyera/oyese - I heard.
- Oyeras/oyeses - you heard.
- Oyera/oyese - he/she heard / you heard (formal).
- Oyéramos/oyésemos - we heard.
- Oyerais/oyeseis - you heard (plural).
- Oyeran/oyesen - they heard / you heard (formal plural).
Test yourself on Imperfect Subjunctive: Irregular 'IR'
How do you say 'we drove' in the imperfect subjunctive in Spanish?