Irregular verbs

Regular verbs

With regular verbs you make the past participle by adding '-ed' behind the verb.
As with the past simple, the -y sometimes changes to an -ie and the last consonant is sometimes doubled.

Examples:

Present tense

Past tense

past participle
to play played played
to live lived lived
to own owned owned
to work worked worked
to cry cried cried
to prefer preferred preferred

Irregular verbs

The irregular verbs have their own form that you have to memorize.

Examples:

Present tense

Past tense

past participle
to be was/were been
to beat beat beaten
to become became become
to begin began begun
to bend bent bent
to bet bet bet
to bind bound bound
to bite bit bitten
to blow blew blown
to break broke broken
to bring brought brought
to build built built
to buy bought bought
to burn burnt burnt
to burst burst burst
to catch caught caught
to choose chose chosen
to come came come
to cost cost cost
to creep crept crept
to cut cut cut
to deal dealt dealt
to dig dug dug
to do did done
to draw drew drawn
to dream dreamt dreamt
to drink drank drunk
to drive drove driven
to eat ate eaten
to fall fell fallen
to feed fed fed
to feel felt felt
to fight fought fought
to find found found
to flee fled fled
to fly flew flown
to forbid forbade forbidden
to forget forgot forgotten
to get got got
to give gave given
to go went gone
to grow grew given
to hang hung hung
to have had had
to hear heard heard
to hide hid hidden
to hit hit hit
to hold held held
to hurt hurt hurt
to keep kept kept
to know knew known
to lay laid laid
to lead led led
to leave left left
to lend lent lent
to let let let
to lie lay lay
to lose lost lost
to make made made
to mean meant meant
to meet met met
to pay paid paid
to put put put
to read read read
to ride rode ridden
to ring rang rung
to rise rose risen
to run ran run
to say said said
to see saw seen
to seek sought sought
to sell sold sold
to send sent sent
to set set set
to shake shook shaken
to shine shone shone
to shoot shot shot
to show showed shown
to shut shut shut
to sing sang sung
to sink sank sunk
to sit sat sat
to sleep slept slept
to smell smelt smelt
to speak spoke spoken
to spend spent spent
to spoil spoilt spoilt
to spread spread spread
to stand stood stood
to steal stole stolen
to stink stank stunk
to strike struck struck
to swear swore sworn
to sweep swept swept
to swim swam swum
to take took taken
to teach taught taught
to tear tore torn
to tell told told
to think thought thought
to throw threw thrown
to understand understood understood
to wake woke woken
to wear wore worn
to win won won
to write wrote written

 

On the internet you can find various lists of irregular verbs.