Irregular IR Verbs (1/6)
Spanish: Edexcel IGCSE, topic 8.2.13
Radical Changing Stems (E → I)
In the preterite tense in Spanish, some verbs change their stem in the 'él/ella' and 'ellos/ellas' forms. These changes only affect these forms of the verb. Derivatives of these verbs follow the same pattern.

Radical changing stem
- Some IR verbs in the preterite tense change their stem.
- In the 'él/ella' and the 'ellos/ellas' forms, the 'e' changes to an 'i'.

Elegir - to choose
- Elegí - I chose.
- Elegiste - you chose.
- Eligió - he/she chose / you chose (formal).
- Elegimos - we chose.
- Elegisteis - you chose (plural).
- Eligieron - they chose / you chose (formal plural).

Mentir - to lie
- Mentí - I lied.
- Mentiste - you lied.
- Mintió - he/she lied / you lied (formal).
- Mentimos - we lied.
- Mentisteis - you lied (plural).
- Mintieron - they lied / you lied (formal plural).

Pedir - to ask
- Pedí - I asked.
- Pediste - you asked.
- Pidió - he/she asked / you asked (formal)
- Pedimos - we asked.
- Pedisteis - you asked (plural).
- Pidieron - they asked / you asked (formal plural)

Sentir - to feel
- Sentí - I felt.
- Sentiste - you felt.
- Sintió - he/she felt / you felt (formal).
- Sentimos - we felt.
- Sentisteis - you felt (plural).
- Sintieron - they felt / you felt (formal plural).

Verbs that follow this pattern
- Medir - to measure.
- Sugerir - to suggest.
- Seguir - to follow, continue.
- Preferir - to prefer.
- Advertir - to warn.
- Corregir - to correct.
Test yourself on Irregular IR Verbs (1/6)
How do you say 'they lied' in Spanish?
¿Cómo diríais 'they suggested' en español?