Feel
Felt
Grow
Grew
Ring
Rung
Bring
Brought
Leave
Left
Know
Knew
Sing
Sang
Fight
Fought
Send
Sent
Throw
Threw
Swing
Swung
Think
Thought
Keep
Kept
Draw
Drew
Hang
Hung
Buy
Bought
spend
Spent
Fly
Flew
Flung
Teach
Taught