irregular verbs:-

Most verbs have past tense and past participle in –ed ( worked, played, listened). But many of the most frequent verbs are irregular:

Base form	Past tense	Past participle
be begin break bring buy build choose come cost cut do draw drive eat feel find get give go have hear hold keep know leave lead let lie lose make mean meet pay put run say see sell send set sit speak spend stand take teach tell think understand wear win write	was/were began broke brought bought built chose came cost cut did drew drove ate felt found got gave went had heard held kept knew left led let lay lost made meant met paid put ran said saw sold sent set sat spoke spent stood took taught told thought understood wore won wrote	been begun broken brought bought built chosen come cost cut done drawn driven eaten felt found got given gone had heard held kept known left led let lain lost made meant met paid put run said seen sold sent set sat spoken spent stood taken taught told thought understood worn won written