Irregular ER Verbs (4/5)
Spanish: Edexcel IGCSE, topic 8.2.10
Strong Preterite Root Vowel Changes to 'U'
Strong preterites are verbs that differ from general rules but still follow a pattern. These verbs change their root vowel to a 'u'.

Poder - to be able to
- Pude - I was able to.
- Pudiste - you were able to.
- Pudo - he/she was able to.
- Pudimos - we were able to.
- Pudisteis - you were able to.
- Pudieron - they were able to.

Poner - to put
- Puse - I put.
- Pusiste - you put.
- Puso - he/she put.
- Pusimos - we put.
- Pusisteis - you put.
- Pusieron - they put.
- For poner, the stem 'pon' becomes 'pus'.

Saber - to know
- Supe - I knew.
- Supiste - you knew.
- Supo - he/she knew.
- Supimos - we knew.
- Supisteis - you knew.
- Supieron - they knew.
- For saber, the stem 'sab' becomes 'sup'.
Strong Preterite Root Vowel Changes to 'I'
Some strong preterite verbs change their root vowel to an 'i'.

Hacer - to do
- Hice - I did.
- Hiciste - you did.
- Hizo - he/she did / you did (formal).
- Hicimos - we did.
- Hicisteis - you did (plural).
- Hicieron - they did / you did (formal plural).

Querer - to want
- Quise - I wanted.
- Quisiste - you wanted.
- Quiso - he/she wanted / you wanted (formal).
- Quisimos - we wanted.
- Quisisteis - you wanted (plural).
- Quisieron - they wanted / you wanted (formal plural).
Test yourself on Irregular ER Verbs (4/5)
How do you say 'we knew' in Spanish?
How do you say 'you (plural) did' in Spanish?