Short
do
did, done
bought, bought
be
was,were , been
forget
forgot, forgotten
think
thought, thought
eat
ate, eaten
spent, spent
bring
brought, brought
understand
understood, understood
read
read, read
see
saw, seen
sell
sold, sold
bite
bit, bitten
take
took, taken
catch
caught, caught
run
ran, run
cost
cost, cost
break
broke, broken
become
became, become
fight
fought, fought
fly
flew, flown
steal
stole, stolen
begin
began, begun
forgive
forgave, forgiven
teach
taught, taught