20 động từ có quy tắc: played, stayed, learned, watched, stopped, looked, wanted, arrived, listened, travelled, loved, agreed, tried, cried, obeyed, omitted, referred, jogged, wicked , typed.
20 động từ bất quy tắc: brought, said, wrote, gave, became, came, ran, abode, began, bit, drank, cut, built, caught, crept, drove, ate, read, awoke , dreamt