2.- Affirmative (Irregular Verbs):

In English, some verbs follow a different pattern when forming the past tense. These verbs are called irregular verbs. You have to learn them by heart.
Here you can find a few examples with the base form and the irregular past form

BE - Was, were	DRIVE - Drove	HAVE - Had	MAKE - Made	SIT - Sat
BREAK - Broke	FALL - Fell	HEAR - Heard	MEET - Met	SLEEP - Slept
BUILD - Built	FIGHT - Fought	KEEP - Kept	PAY - Paid	SPEAK - Spoke
CATCH - Caught	FIND - Found	LEAVE - Left	SAY - Said	TAKE - Took
COME - Came	FLY - Flew	LEND - Lent	SELL - Sold	TELL - Told
DRAW - Drew	GET - Got	LOSE - Lost	SEND - Sent	WIN - Won