a-f
(to) buy
bought, bought
(to) get
(to) let
let, let
(to) run
ran, ran
(to) understand
(to) do
did, done
(to) go
went, gone
(to) make
made, made
(to) see
saw, seen
(to) wear
wore, worn
(to) eat
ate, eaten
(to) know
knew, known
(to) put
put, put
(to) sing
sang, sung
(to) write
wrote, written
(to) forget
forgot, forgotten
(to) give
(to) meet
met, met
(to) sleep
slept, slept
(to) win
won, won
was/were, been
(to) have
had, had
(to) pay
paid, paid
(to) take
took, taken
(to) wake up
woke up, woken up