-Ar
-Er
-Ir
Stem Change
Yo- form Stem Change
100

Crear

To create

100

Deber

Should, to owe

100
Permitir

To allow

100

Acordarse (o-ue)

To remember, to remind

100

Caerse (Me caigo)

To fall

200

Cambiar

To change or exchange

200
Creer

To believe

200

Incluir

To include

200

Recordar (o-ue)

To remember

200

Oir (yo oigo)

To hear

300

Apagar

To turn off

300

Aprender

To learn

300

Decidir 

To decide

300

Cerrar (e-ie)

To close

300

Recoger (yo recojo)

To pick up

400

Explicar

To explain

400

Prender

To turn on

400

Construir 

To build

400

Contar (o-ue)

To count, to tell

400

Reir (yo rio)

To laugh

500

Lavar, Limpiar

To clean, to wash

500

Conocer 

To meet, to get to know

500

Subir

To raise, go up, increase

500

Doler (o-ue)

To ache

500
Sonreir (Yo sonrio)

To smile