Difficult
Be
Was were
Grow
Grew
Sit
Sat
Wake
Woke
Play
Played
Come
Take
Took
Throw
Threw
Do
Did
Sing
Sang
Break
Broke
Wear
Wore
Bite
Bit
Give
Gave
Hear
Heard
See
Saw
Feed
Fed
Leave
Left
Keep
Kept
Hold
Held
Pay
Paid
Shrink
Shrank
Stand
Stood
Tear