一、规则动词(RegullarVerbs)的过去式由''动词原形+-ed〃构成，具体变化有：1. 一般的直接在词尾^口-ed如：want—wanted,work—worked,need—needed,clean—cleaned2. 以不发音的e结尾的在词尾加-d如:like—liked,live—lived,use—used,move—movedsmile--smiled;hope--hoped.注意：ie结尾动词,直接加d:died;tied.3. 以一个元音字母加一个辅音字母结尾的重读闭音节动词，先双写结尾的辅音字母，再加-edo如：stop—stopped,trip—trippedplanned;4. 以辅音字母加y结尾的动词，先把y变成i,再加-edo如:study—studied,carry-carried,hurry—hurried,marry—marriedworried;studied.注意：规则动词过去式加“ed〃后的发音规则：在浊辅音和元音后面[d]moved[mu:vd]called[ko：ld]borrowed[borsud]在清辅音后面[t]在[t][d]音后面[id]helped[helpt]started['sta:tid]passed[pa:st]counted['kauntid]needed]'ni:did]counted['kauntid]补充说明:二、不规则动词(IrregularVerbs)的过去式大体上归纳有以下记忆法：1. 以t结尾的词，过去式与原形相同。
如：put—put,let—let,cut—cut,beat—beatread—readmust--must2. 以d结尾的词，把d变成to如:build—built,lend—lent,send—sent,spend—spent3. 以n结尾的词，在词后加to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—grewthrow—threw(动词show除外，show—showed)5. 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—smeltsweep—swept6. 含有元音字母o/i的词，将o/i变成a如:come—camebecome—becamesing—sang,give—gave,sit—sat,drink—drank7. 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—taught8. 把重读开音节中的i改为o,变成过去式。
如：drive—drove，ride—rode，write—wrote9•动词原形中的e改为o,如:get—got，forget—forgot10. 动词原形中的ee改为e,如：feed—fed，meet—met11. 动词原形中的eak改为oke,如：break—broke，speak—spoke12. 动词原形中的ell改为old,如：sell—sold，tell—told13. 动词原形中的an改为oo,如：stand—stood,understand—understood14. 以ould结尾且读音为〔ud〕的情态动词过去式如：can—could,shall—should,will—would15•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〕16.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,find—found,fly—flew,go—went,have／has—had,hold—held,leave—left,make—made,may—might,run—ran,see—saw,take—took。