Regular Endings
AR "yo" ending
"é"
She danced
ella bailó
ser means
to be
andar's stem changes to
anduv
I came
yo vine
IR nosotros ending
"imos"
I ate
yo comí
I went
yo fui
querer's stem changes to
quis
You informal were able to
Tu pudiste
you (formal) AR ending
"ó"
You (informal) returned
tú volviste
I saw
Yo vi
traer's stem changes to
traj
We talked
nosotros dijimos
they ER ending
"ieron"
We rode the bicycle
Nosotros montamos la bicicleta
dar means
to give
decir's stem changes to
dij
I walked
yo anduve
vosotros ER ending
"isteis"
I crossed
Yo crucé
They gave
Ellos dieron
poder's stem changes to
pud
They put
Ellos pusieron