The past simple of "FORGET" is "FORGOTTEN"

The past simple of "HIT" is "HIT"

The past simple of " FALL" is "FELL"

The past simple of " LEAVE" is "LEAFT"

The past simple of "FLY" is "FLOW"

The past simple of "DRAW" is " DROW"

The past simple of "SING" is "SUNG"

The past simple of "MUST" is "HAD TO"

The past simple of "RIDE" is "RODE"

The past simple of " THINK" IS "THANK"