jugar
to play (u –>ue)
volar
to fly (o–>ue)
costar
to cost (o–>ue)
dormir
to sleep (o–>ue)
poder
to be able to, can (o–>ue)
servir
to serve (e–>i)
decir
to say, tell ( e–>i)
repetir
to repeat (e–>i)
preferir
to prefer ( e–>ie)
querer
to want (e–>ie)
cerrar
to close ( e–>ie)
empezar
to start (e–>ie)
-AR verb endings
-o. -amos
-as - ais
- a - an
-ER verb endings
-o -emos
-es - eis
-e - en
-IR verb endings
-o -imos
-es - is
-e - en