外研版初一英语下册最后一页的不规则动词的过去式

不规则动词的过去式的构成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—swam2．把重读开音节中的i改为o，变成过去式。如：　　drive—drove，ride—rode，write—wrote3．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—forgot5．动词原形中的ee改为e，变成过去式。如：feed—fed，meet—met6．动词原形中的eep改为ept，变成过去式。如keep—kept，sleep—slept，sweep—swept7．动词原形中的eak改为oke，变成过去式。如：break—broke，speak—spoke8．动词原形中的ell改为old，变成过去式。如：sell—sold，tell—told9．动词原形中的an改为oo，变成过去式。如：stand—stood，understand—understood10．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—taught11．以ould结尾且读音为［ud］的情态动词过去式。如：　　can—could，shall—should，will—would12．把动词原形中的o改为a，变成过去式。如：come—came，become—became13．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—took1.以t结尾的词，过去式与原形相同。如：put—put,let—let,cut—cut,beat—beat2.以d结尾的词，把d变成t。如:build—built,lend—lent,send—sent,spend—spent3.以n结尾的词，在词后加t。如：mean—meant,burn—burnt,learn—learnt4.以ow/aw结尾的词，把ow/aw变成ew。如：blow—blew,draw—drew,know—knew,grow—grew5.含有双写字母的词，将双写改为单写，在词尾加t。如：keep—kept,sleep—slept,feel—felt,smell—smelt6.含有元音字母o/i的词，将o/i变成a。如：sing—sang,give—gave,sit—sat,drink—drank规则动词词尾加-ed有三种读音：1.在清辅音后读作[t]。如：asked,helped,watched,stopped2.在浊辅音和元音后读作[d]。如：enjoyed,studied,moved,called3.在t/d后读作[id]。如：wanted,needed