Regular Verbs
Irregular Verbs
Stem-Changers
Dirty Dozen Verbs
Yo Spelling Changes
100

I ran (correr)

Corrí

100

You went (Ir)

fuiste or fue

100

he asked for (pedir)

pidió

100

I walked (andar)

anduve

100

I played (jugar)

jugué

200

He lived (vivir)

vivió

200

They were (ser)

fueron

200

they measured (medir)

midieron

200

We were (estar)

estuvimos

200

I searched for (buscar)

busqué

300

They spoken (hablar)

hablaron

300

I gave (dar)

di

300

They read (leer)

leyeron

300

they came (venir)

vinieron

300

What are the three types of verbs that have spelling changes in the yo form?

-gar, -car, -zar

400

You wrote 

escribiste or escribió

400
We saw
vimos
400

she said good bye (despedir)

despidió

400

I brought

traje

400

I ate lunch 

almorcé

500

Y'all sang 

Cantaron or Cantasteis

500
y'all saw
vieron or visteis
500

You converted (convertir)

convirtió or convertiste

500
they did
hicieron
500

Why is there a spelling change in the yo form of these verbs?

In order for the conjugated form to sound like the infinitive, the spelling must change slightly.