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【过去式的变化规则】①一般情况下,在动词原形后直接加ed。如:wanted,played。②以不发音的字母e结尾的动词,直接加d。如:hoped,lived。③重读闭音节单词需双写最后一个辅音字母,再加ed。如:stopped,shipped。④以辅音字母+y结尾的动词变y为i,再加ed。如:studied,worried。⑤有些动词不符合上面的规则,需要特殊记忆。如:am(is)-was,are-were,go-went,eat-ate,Swim-swam,buy-bought,see-saw,Teach-taught,bring-brought,think-thought,Fall-fell,hurt-hurt,break-broke,win-won,Lose-lost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]CalledborrowedMoved[mu:vd]enjoyedWelcomedanswered在清辅音后面[t]Askedfinishedhelped[helpt]passed[pa:st]Reached在[t]音后面[id]wanted['wCntid]started['sta:tid][d]音后面[id]Needed['ni:did]counted['kauntid]0清:/p//t//k//f//F/s//W//tF//ts//tr/浊:/b//d//g//v//V//z//T//dV//dz//dr/补充说明:规则动词的过去式由“动词原形+-ed”构成,具体变化有:1.直接在词尾加-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—moved3.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-ed。如:stop—stopped,trip—tripped4.以辅音字母加y结尾的动词,先把y变成i,再加-ed。如:study—studied,carry—carried,hurry—hurried,marry—married不规则动词的过去式大体上归纳有以下六条记忆法:1.以t结尾的词,过去式与原形相同。如:put—put,let—let,cut—cut,beat—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规则动词的过去式变化如下:1、一般情况下,动词词尾加-ed,如:work---workedplay---playedwanted----wantedact----acted2、以不发音的-e结尾动词,动词词尾加-d,如:live---livedmove----movedtaste---tastedhope---hoped3、以辅音字母+y结尾的动词,把-y变为-i再加-ed,如:study---studiedcopy---copiedcry---criedcarry---carried4、以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加-ed,如:stop---stopped5、不规则动词的过去式变化规律性不强,须多加记忆。go–wentmake–madeget–gotbuy-boughtcome-camefly-flew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—took
本文标题:过去式的变化规则
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