run
ran/run
say
said/said
see
saw/seen
sink
sank/sunk
sit
sat/sat
sleep
slept/slept
speak
spoke/spoken
spend
spent/spent
stand
stood/stood
stick
stuck/stuck
swim
swam/swum
take
took/taken
tell
told/told
think
thought/thought
throw
threw/thrown
understand
understood/understood
