Irregular Verbs
Present------------------------------Past----------------------Past participle

Important

to be, am, is, are-------------------was, were-------------------------been-----------ser, estar
come---------------------------------came-----------------------------come----------venir
do-----------------------------------did------------------------------done----------hacer
go----------------------------------went---------------------------gone-------------ir
have--------------------------------had----------------------------had---------------tener
know--------------------------------knew---------------------------known-------------conocer, saber
make--------------------------------made---------------------------made---------------hacer

-en

bite----------------------------------------bit-------------------------------bitten--------------morder
break--------------------------------broke-----------------------------broken------romper
choose-------------------------------chose----------------------------chosen--------elegir
drive-------------------------------drove--------------------------driven-----------manejar
eat---------------------------------ate----------------------------eaten------------comer
fall--------------------------------fell---------------------------fallen-----------caer
forget------------------------------forgot-------------------------forgotten--------olvidar
forgive-----------------------------forgave------------------------forgiven---------perdonar
get---------------------------------got----------------------------gotten-----------conseguir
give--------------------------------gave---------------------------given------------dar
see---------------------------------saw----------------------------seen---------------ver
speak-------------------------------spoke--------------------------spoken--------------hablar
steal-------------------------------stole--------------------------stolen-------------robar
take--------------------------------took---------------------------taken---------------tomar
wake--------------------------------woke---------------------------woken-------------despertar
write---------------------------------wrote-----------------------written-----------------escribir

-ght

bring--------------------------------brought---------------------------brought-----llevar
buy----------------------------------bought----------------------------bought-------comprar
catch--------------------------------caught----------------------------caught-------atrapar
fight-------------------------------fought-------------------------fought-----------pelear
teach-------------------------------taught-------------------------taught-------------enseñar
think-------------------------------thought------------------------thought-------------pensar

All three the same

cost---------------------------------cost-----------------------------cost----------costar
cut----------------------------------cut------------------------------cut-----------cortar
hurt--------------------------------hurt---------------------------hurt--------------doler
put---------------------------------put----------------------------put----------------poner
quit--------------------------------quit---------------------------quit---------------quitar
read--------------------------------read---------------------------read---------------leer

All three different

begin--------------------------------began-----------------------------begun-------empezar
blow---------------------------------blew------------------------------blown-----------soplar
drink-------------------------------drank--------------------------drunk------------beber
fly---------------------------------flew---------------------------flown------------volar
grow--------------------------------grew---------------------------grown-------------crecer
shine-------------------------------shined-------------------------shone--------------brillar
show--------------------------------showed-------------------------shown--------------monstrar
sing---------------------------------sang------------------------------sung------------------cantar
sink--------------------------------sank---------------------------sunk---------------hundir
swim--------------------------------swam---------------------------swum----------------nadar
tear--------------------------------tore---------------------------torn--------------desgarrar
throw-------------------------------threw--------------------------thrown---------------tirar
wear--------------------------------wore---------------------------worn---------------vestir

The same in Present and Past Participle but different in Past Simple

become-------------------------------became----------------------------become------transformarse
run---------------------------------ran----------------------------run----------------correr

Past Simple and Past Participle the same

build--------------------------------built-----------------------------built-------construir
burn---------------------------------burnt, burned----------------burnt, burned-----quemar
dream-------------------------------dreamed, dreamt-------------dreamed, dreamt-----soñar
feel--------------------------------felt---------------------------felt-------------sentir
find--------------------------------found--------------------------found------------encontrar
hear--------------------------------heard--------------------------heard--------------oir
hold--------------------------------held---------------------------held--------------manejar
keep--------------------------------kept---------------------------kept--------------mantener
lay---------------------------------laid---------------------------laid--------------acostar
leave-------------------------------left---------------------------left--------------salir
lend--------------------------------lent---------------------------lent--------------prestar
let---------------------------------let----------------------------let---------------dejar
light-------------------------------lit----------------------------lit---------------encender
lose--------------------------------lost---------------------------lost---------------perder
meet--------------------------------met----------------------------met----------------conocer
pay---------------------------------paid---------------------------paid---------------pagar
say---------------------------------said---------------------------said---------------decir
sell--------------------------------sold---------------------------sold---------------vender
send--------------------------------sent---------------------------sent---------------enviar
shoot-------------------------------shot---------------------------shot---------------despegar
sit--------------------------------------sat----------------------------sat-----------------------sentar
spend-------------------------------spent--------------------------spent---------------gastar
stand-------------------------------stood--------------------------stood-----------estar en pies
stick-------------------------------stuck--------------------------stuck---------------pegar
sweep-------------------------------swept--------------------------swept---------------borar
tell--------------------------------told---------------------------told----------------decir
upset-------------------------------upset--------------------------upset---------------alterar