am, is, are - was, were - been
take - took - token
have, has - had - haven
go, goes - went - gun
come - came - came
make - makes - makes
hear - heard - heard
bring - brought -brought
buy - bought - bought
cut - cutted - cutted
do - did - did
Eat - ate - eten
fly - flu - flown
fall - feel- fallen
get - got - got
sleep - slept - slept
read - red - red
speak - spoke - spoke
tell - told -told
think - tought - tought