Sleep
Slept
Think
Thought
Have
Had
Eat
Eaten
Flee
Fled
Burn
Burnt/Burned
Ride
Ridden
Bring
Brought
Build
Built
Sing
Sung
Dig
Dug
Write
Written
Wear
Wore
Break
Broken
Send
Sent
Feed
Fed
Swim
Swum
Climb
Climbed
Wake up
Woken up
Be
Been
Keep
Kept
Bite
Bitten