动词如何加ED

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