is, am, are, was, were, has been, have been, beat, beaten, become, became, begin, began, begun, bend, bent, bet, bid, bite, bit, bitten, blow, blew, blown, break, broke, broken, bring, brought, build, built, burn, burned, burnt, buy, bought, catch, caught, choose, chose, chosen, come, came, cost, cut, dig, dug, dive, dove, dived, do, did, done, draw, drew, drawn, dream, dreamed, dreamt, drive, drove, driven, drink, drank, drunk, eat, ate, eaten, fall, fell, fallen, feel, felt, fight, fought, find, found, fly, flew, flown, forget, forgot, forgotten, forgive, forgave, forgiven, freeze, froze, frozen, get, got, gotten, give, gave, given, go, went, gone, grow, grew, grown, hang, hung, have, had, hear, heard, hide, hid, hidden, hit, hold, held, hurt, keep, kept, know, knew, known, lay, laid, lead, led, leave, left, lend, lent, let, lie, lain, lose, lost, make, made, mean, meant, meet, met, pay, paid, put, read, ride, rode, ridden, ring, rang, rung, rise, rose, risen, run, ran, say, said, see, saw, seen, sell, sold, send, sent, show, showed, shown, shut, sing, sang, sung, sit, sat, sleep, slept, speak, spoke, spoken, spend, spent, stand, stood, swim, swam, swum, take, took, taken, teach, taught, tear, tore, torn, tell, told, think, thought, throw, threw, thrown, understand, understood, wake, woke, woken, wear, wore, worn, win, won, write, wrote, written