100
1. What do all these verbs have in common:
devolver, encontrar, recordar, poder
2. What do all these verbs have in common:
hacer, comer, volver, querer
3. What do all these verbs have in common:
preferir, empezar, cerrar, entender
1. O-UE stem-changing verbs
2. All -ER verbs
3. E-IE stem-changing verbs