Stem-changing verbs

# F. J. Villatoro #

Stem-changing verbs

Some verbs in the present are known as stem-changing verbs or radical-changing verbs. There are three groups of stem-changing verbs:


O -> ue

E -> ie

E -> i


With the first group of stem-changing verbs, the letter o in the stem changes to ue in all forms except the nosotros and vosotros. That is why they are also called 1 2 3 6 verbs, because those are the parts that change and not 4 and 5.


dormir
duermo
duermes
duerme
dormimos
dormís
duermen

Notice that the endings are the same for regular -AR, -ER or -IR verbs and it is the stem that changes.


Here is a list of common o -> ue stem-changing verbs:


almorzar to eat lunch
mostrar to show
colgar to hang
dormir to sleep
probar to prove, test, sample, taste
costar to cost
devolver to return (an object)
resolver to solve
volver to return (from someplace)
encontrar to find