Образуйте форму 2nd form( past simple tense)- was/were have, see, meet, read, go, come, lose, fly, buy, become, find, write. образуйте форму 3rd form ( used in the present perfekt tense) -been: слова те же: have, see, meet, read, go, come, lose, fly, buy, become, find, write
Had, seen, met, read, gone, come, lost, flown, bought, become, found, written.