Irregular ER Verbs
Spanish: AQA A Level, topic 16.6.8
Stem Spelling Change (I → Y)
In the preterite tense, some verbs change their spelling. This only happens in the 'él/ella' and the 'ellos/ellas' forms - the other forms gain an accent on the 'i'.

Leer - to read
- Leí - I read.
- Leíste - you read.
- Leyó - she read.
- Leímos - we read.
- Leísteis - you (plural) read.
- Leyeron - they read.

Caer - to fall
- Caí - I fell.
- Caíste - you fell.
- Cayó - she fell.
- Caímos - we fell.
- Caísteis - you (plural) fell.
- Cayeron - they fell.
'Ser' in the Preterite Tense
'Ser' is completely irregular in the preterite tense.

Fui - I was

Fuiste - you were

Fue - he/she was

Fuimos - we were

Fuisteis - you were

Fueron - They were
Test yourself on Irregular ER Verbs
¿Cómo diríais 'I fell' en español?
¿Qué significa 'fui' en inglés?
How do you say 'you were' (plural) in Spanish?