WEAR
WORE
TEACH
TAUGHT
SWIM
SWAM
SELL
SOLD
SING
SANG
UNDERSTAND
UNDERSTOOD
SPEAK
SPOKE
THINK
THOUGHT
WAKE
WOKE
TELL
TOLD
SPEND
SPENT
SLEEP
SLEPT
WIN
WON
WRITE
WROTE
SAY
SAID
SEE
SAW
SEND
SENT
SIT
SAT