go-went，make-made，get-got，buy-bought，come-came，fly-flew，is、am-was，are-were，see-saw，bring-brought，do-did，teach-taught,think-thought,say-said,sit-sat.read-read,spend-spent,eat-ate,give-gave,sit-sat,tell-told,write-wrote,feel-felt,find-found,hear-heard,know-knew,put-put,grow-grew,take-took,catch-caught,come-came,become-became,swim-swam，sweep—swept，sing—sang，draw—drew，