bring
brought-brought
buy
bought-bought
fight
fought-fought
think
thought-thought
catch
caught-caught
teach
taught-taught
cost
cost-cost
become
became-become
swim
swam-swum
run
ran-run
forget
forgot-forgot (forgotten)
begin
began-begun
eat
ate-eaten
drink
drank-drunk
fly
flew-flown
take
took-taken
