Irregular verbs are those that are not conjugated in the past or past participle following some rule or regular pattern, therefore, the only way to know the past form of this type of verbs is to know them by heart.

Here is a commonly used irregular verbs list with their base form, simple past form and the past participle.

Irregular verbs list.
Present	Past	Participle	Translation
arise	arose	arisen	surgir
be	was / were	been	ser, estar
beat	beat	beaten	golpear
become	became	become	convertirse
begin	began	begun	comenzar
bet	bet/betted	bet/betted	apostar
bite	bit	bitten	morder
bleed	bled	bled	sangrar
blow	blew	blown	soplar
break	broke	broken	romper
bring	brought	brought	traer
build	built	built	construir
buy	bought	bought	comprar
catch	caught	caught	atrapar
choose	chose	chosen	elegir
come	came	come	venir
cost	cost	cost	costar
creep	crept	crept	arrastrarse
cut	cut	cut	cortar
deal	dealt	dealt	dar, repartir, tratar
do	did	done	hacer
draw	drew	drawn	dibujar
dream	dreamt/dreamed	dreamt/dreamed	soñar
drink	drank	drunk	beber
drive	drove	driven	conducir
eat	ate	eaten	comer
fall	fell	fallen	caer
feed	fed	fed	alimentar
feel	felt	felt	sentir
fight	fought	fought	pelear
find	found	found	encontrar
flee	fled	fled	huir
fly	flew	flown	volar
forget	forgot	forgotten	olvidar
forgive	forgave	forgiven	perdonar
forsake	forsook	forsaken	abandonar
freeze	froze	frozen	congelar
get	got	got	tener, obtener
give	gave	given	dar
go	went	gone	ir
grind	ground	ground	moler
grow	grew	grown	crecer
hang	hung	hung	colgar
have	had	had	tener
hear	heard	heard	oír
hide	hid	hidden	esconderse
hit	hit	hit	golpear
hold	held	held	tener, mantener
hurt	hurt	hurt	herir, doler
keep	kept	kept	guardar
kneel	knelt	knelt	arrodillarse
know	knew	known	saber
lead	led	led	encabezar, dirigir
learn	learnt/learned	learnt/learned	aprender
leave	left	left	dejar, marcharse, salir
lend	lent	lent	prestar
let	let	let	dejar, dar permiso
lie	lay	lain	tumbarse, echarse, yacer
lose	lost	lost	perder
make	made	made	hacer
mean	meant	meant	significar, querer decir
meet	met	met	conocer, encontrar, quedar con
pay	paid	paid	pagar
put	put	put	poner
quit	quit/quitted	quit/quitted	abandonar
read	read	read	leer
ride	rode	ridden	montar, ir
ring	rang	rung	llamar por teléfono
rise	rose	risen	elevar
run	ran	run	correr
say	said	said	decir
see	saw	seen	ver
sell	sold	sold	vender
send	sent	sent	enviar
set	set	set	fijar, establecer, poner
sew	sewed	sewn/sewed	coser
shake	shook	shaken	sacudir, agitar
shine	shone	shone	brillar
shoot	shot	shot	disparar
show	showed	shown/showed	mostrar
shrink	shrank/shrunk	shrunk	encoger
shut	shut	shut	cerrar
sing	sang	sung	cantar
sink	sank	sunk	hundir
sit	sat	sat	sentarse
sleep	slept	slept	dormir
slide	slid	slid	deslizar
sow	sowed	sown/sowed	sembrar
speak	spoke	spoken	hablar
spell	spelt/spelled	spelt/spelled	deletrear
spend	spent	spent	gastar, pasar tiempo
spill	spilt/spilled	spilt/spilled	derramar
split	split	split	partir, dividir en dos
spoil	spoilt/spoiled	spoilt/spoiled	estropear, mimar
spread	spread	spread	extenderse
stand	stood	stood	estar de pie
steal	stole	stolen	robar
sting	stung	stung	picar, clavar el aguijón
stink	stank/stunk	stunk	apestar
strike	struck	struck	golpear
swear	swore	sworn	jurar
sweep	swept	swept	barrer
swim	swam	swum	nadar
take	took	taken	tomar
teach	taught	taught	enseñar
tear	tore	torn	romper
tell	told	told	decir
think	thought	thought	pensar
throw	threw	thrown	lanzar
tread	trode	trodden/trod	pisar
understand	understood	understood	entender
wake	woke	woken	despertarse
wear	wore	worn	llevar puesto
weave	wove	woven	tejer
weep	wept	wept	llorar
win	won	won	ganar
wring	wrung	wrung	retorcer
write	wrote	written	escribir

A Piece of Advice

In the next video which you can improve your grammar about irregular verbs in past simple:

Summary text.