Past participle
Give
given
Eat
eaten
See
seen
Go
gone
Think
thought
Write
written
Drink
drunk
Leave
left
Forgive
forgiven
Buy
bought
Be
been
Meet
met
Know
known
Teach
taught
Sleep
slept
Spend
spent
Do
done
Become
become
Travel
traveled
Sweep
swept
Speak
spoken
Make
made
Sing
sung
Decide
decided
Keep
kept