1.把动词原形中的 i 改为 a,变成过去式。如: begin—began,drink—drank,give—gave,ring—rang,sing—sang,sit—sat, swim—swam 2.把重读开音节中的 i 改为 o,变成过去式。如: drive—drove,ride—rode,write—wrote 3.改动词原形中的 aw /ow 为 ew,变成过去式。如: draw—drew,grow—grew,know—knew,throw—threw(动词 show 除外, show—showed) 4.动词原形中的 e 改为 o,变成过去式。如: get—got,forget—forgot 5.动词原形中的 ee 改为 e,变成过去式。如: feed—fed,meet—met 6.动词原形中的 eep 改为 ept,变成过去式。如: keep—kept,sleep—slept,sweep—swept 7.动词原形中的 eak 改为 oke,变成过去式。如: break—broke,speak—spoke 8.动词原形中的 ell 改为 old,变成过去式。如: sell—sold,tell—told 9.动词原形中的 an 改为 oo,变成过去式。如: stand—stood,understand—understood 10.以 ought 和 aught 结尾,且读音是〔 :t〕的过去式。如: bring—brought, buy— bought, think—thought, catch—caught, teach—taught 11.以 ould 结尾且读音为〔ud〕的情态动词过去式。如: can—could,shall—should,will—would 12.把动词原形中的 o 改为 a,变成过去式。如: come—came,become—became 13.在动词原形后加 d 或 t 变成过去式,并且发生音变。如: hear〔hi 〕—heard〔h :d〕 say〔sei〕—said〔sed〕 , ,mean〔mi:n〕—meant 〔ment〕 14.动词的过去式与动词原形一样。如: let—let,must—must,put—put,read—read〔red〕 15.不符合上述规律的动词过去式。如: am, is—was, are—were, build—built, do—did, eat—ate, fall—fell, feel—felt, find—found, fly—flew, go—went, have /has— had, hold—held, leave—left, make—made,may—might,run—ran,see—saw,take—took