Irregular Preterite Verbs

Te preterite is used for past actions that are seen as completed.


To conjugate regular -ar verbs in the preterite, simply drop the ending (-ar) and add one of the following:
é
aste
ó
amos
asteis
aron


To conjugate regular -er and -ir verbs in the preterite, simply drop the ending (-er or -ir) and add one of the following:
í
iste
ió
imos
isteis
ieron

Below are the preterite froms of some irregular verbs:
Ser and I:
fui
fuiste
fue
fuimos
fuisteis
fueron

Hacer:
the stem changes to hic-
hice
hiciste
hizo
hicimos
hicisteis
hicieron

Poder(to be able to)
the stem changes to pud-
pude
pudiste
pudo
pudimos
pudisteis
pudieron

Tener(to have)
the stem changes to tuv-
tuve
tuviste
tuvo
tuvimos
tuvisteis
tuvieron