Common Spanish Stem-Changing and Irregular 'Yo' Verbs

E to IE stem-changing verb: pensar

• to believe

• to think/to plan

• to forget

• to remember

E to IE stem-changing verb: entender

• to comprehend

• to perceive

• to understand

• to explain

O to UE stem-changing verb: recordar

• to forget

• to remember

• to recall

• to learn

Irregular 'yo' form verb: hacer

• hago (to do/make)

• haces (you do/make)

• hace (he/she/it does/makes)

• hacemos (we do/make)

E to IE stem-changing verb: querer

• to love

• to need

• to want

• to wish

O to UE stem-changing verb: poder

• to have

• to want

• to be able to

• to go

Irregular 'yo' form verb: decir

• digo (to say/tell)

• dico (to say/tell)

• decir (to say/tell)

• diga (to say/tell)

Irregular 'yo' form verb: oír

• oigo (to hear)

• oígo (to listen)

• oíro (to hear)

• oígo (to see)

Irregular 'yo' form verb: salir

• salgo (to leave)

• saliré (I will leave)

• salía (I was leaving)

• saldré (I will leave)

Irregular 'yo' form verb: poner

• pongo (to put/place)

• puse (to put/place)

• pondré (to put/place)

• ponía (to put/place)