Irregular verbs have unpredictable past tense and past participle forms. Some common irregular verbs and their forms include: become (became, become), begin (began, begun), bite (bit, bitten), break (broke, broken), bring (brought, brought), buy (bought, bought), catch (caught, caught), choose (chose, chosen), come (came, come), cut (cut, cut), deal (dealt, dealt), do (did, done), drink (drank, drunk), eat (ate, eaten), fall (fell, fallen), feel (felt, felt), find (found, found), fly (flew, flown), get (got, got