same three forms
cortar
cut / cut / cut
convertirse
conocer
meet / met / met
dibujar
draw / drew / drawn
conducir
drive / drove / driven
dejar
let / let / let
venir
come / came / come
dormir
sleep / slept / slept
volar
fly / flew / flown
pagar
pay / paid / paid
poner
put / put / put
correr
run / ran / run
sentar
sit / sat / sat
know / knew / known
hablar
speak / spoke / spoken
leer
read / read / read
comprar
buy / bought / bought
soplar
blow / blew / blown
vender
sell / sold / sold
tener
have / had / had
nadar
swim / swam / swum
poder
can / could / be able to