Preterite: Irregular 'IR' Verbs (2/4)
Spanish: Cambridge International GCSE, topic 8.2.18
Radical Changing Stems (O → U)
In the preterite tense, some verbs change their stems in the 'él/ella' and 'ellos/ellas' forms, with the 'o' changing to a 'u'. The two verbs that follow this pattern are 'morir' and 'dormir'.

Morir - to die
- Morí - I died.
- Moriste - you died.
- Murió - he/she died / you died (formal).
- Morimos - we died.
- Moristeis - you died (plural).
- Murieron - they died / you died (formal plural).

Dormir - to sleep
- Dormí - I slept.
- Dormiste - you slept.
- Durmió - he/she slept / you slept (formal).
- Dormimos - we slept.
- Dormisteis - you slept (plural).
- Durmieron - they slept / you slept (formal plural)
Test yourself on Preterite: Irregular 'IR' Verbs (2/4)
¿Cómo diríais 'she slept well' en español?