SIT
SAT-SAT
STAND
STOOD-STOOD
TELL
TOLD-TOLD
SING
SANG-SUNG
WAKE
WOKE-WOKEN
SLEEP
SLEPT-SLEPT
SPEAK
SPOKE-SPOKEN
TEACH
TAUGHT-TAUGHT
SWIM
SWAM-SWUM
TAKE
TOOK-TAKEN
WRITE
WROTE-WRITTEN