BUY
bought- bought
DRINK
drank -drunk
CATCH
caught - caught
RING
rang - rung
THINK
thought - thought
BECOME
became - become
SINK
sank - sunk
BRING
brought - brought
FIGHT
fought - fought
COME
came - come
TEACH
taught - taught
SEEK
sought - sought
SWIM
swam- swum
SHRINK
shrank - shrunk
RUN
ran -run
OVERCOME
overcame - overcome
BEGIN
began - begun