CIR and CER
yo form: zco (or zo in special cases)
Three (más o menos) stem changes
o-ue, e-i, e-ie
IAR and UAR
in all forms except vosotros and nosotros, it is ú and í
UIR
normalemente –> y . Hay muchas excepciones
GER and GIR
yo form: -jo
GUIR
yo form: drop I and U
yo “caber”
quepo
yo “caer”
caigo
yo “dar”
doy
yo “decir”
digo
yo “poner”
pongo
yo “saber”
sé
yo “salir”
salgo
yo “traer”
traigo
yo “valer” (to be worth)
valgo
yo “ver”
veo
yo “oír”
oigo
yo “gemir”
gimo…etc (e-i)
yo “seguir”
sigo