Present: Irregular 'IR' Verbs (3)
Spanish: Cambridge International GCSE, topic 8.1.17
Stem Changing Verbs (O → UE)
When conjugated in the present tense, some -IR verbs change. The 'u' in the infinitive becomes 'ue'. This does NOT happen in the 'nosotros' and 'vosotros' forms. Derivatives of these verbs follow the same pattern.

Stem changes O → UE
- When conjugated, these IR verbs change from their infinitive form.
- The 'o' in the infinitive changes to 'ue' when conjugated.
- E.g. Morir (to die) becomes 'muero' (I die).
- E.g. Muero, mueres, muere, morimos, morís, mueren.

Dormir - to sleep
- Duermo - I sleep.
- Duermes - you sleep.
- Duerme - he/she sleeps / you sleep (formal).
- Dormimos - we sleep.
- Dormís - you sleep (plural).
- Duermen - they sleep / you sleep (formal plural).

Morir - to die
- Muero - I die.
- Mueres - you die.
- Muere - he/she dies / you die (formal).
- Morimos - we die.
- Morís - you die (plural).
- Mueren - they die / you die (formal plural).
Test yourself on Present: Irregular 'IR' Verbs (3)
¿Qué significa 'dormimos' en Inglés?