understand
understood / understood
think
thought / thought
win
won / won
tell
told / told
feel
felt / felt
swim
swam / swum
throw
threw / thrown
give
gave / given
be
was - were / been
take
took / taken
begin
began / begun
sell
sold / sold
shake
shook / shaken
wake
woke / woken
smell
smelt / smelt
undo
undid / undone
