FIRST
TO BE
WAS / WERE
TO HAVE
HAD
TO UNDERSTAND
UNDERSTOOD
TO GO
WENT
TO DRINK
DRANK
TO THINK
THOUGHT
TO BUY
BOUGHT
TO BRING
BROUGHT
TO CATCH
CAUGHT
TO TEACH
TAUGHT
TO WEAR
WORE
TO STAND
STOOD
TO SING
SANG
TO SELL
SOLD
TU RUN
RAN
TO LOSE
LOST
TO CHOOSE
CHOSE
TO BEGIN
BEGAN
TO DRIVE
DROVE
TO KEEP
KEPT
TO SLEEP
SLEPT
TO SWIM
SWAM
TO FLY
FLEW
TO LEAVE
LEFT
TO FALL
FELL