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