be (is/am/are)
was/were --> been
break
broke --> broken
bring
brought --> brought
buy
bought --> bought
do
did --> done
eat
ate --> eaten
come
came --> come
fall
fell --> fallen
feed
fed --> fed
feel
felt --> felt
find
found --> found
fly
flew --> flown
forget
forgot --> forgotten
get
got --> got
give
gave --> given
go
went --> gone
