learn的过去式(keep的过去式)
大家好,我是小典,我来为大家解答以上问题。learn的过去式,keep的过去式很多人还不知道,现在让我们一起来看看吧!
1、规则动词的过去式变化如下:一般情况下,动词词尾加 -ed ,如:work ---worked play---played wanted----wanted act----acted 2、以不发音的 -e 结尾动词,动词词尾加 -d,如:live---lived move----moved taste---tasted hope---hoped 3、以辅音字母 + y结尾的动词,把-y变为-i 再加-ed,如:study---studied copy---copied cry---cried carry---carried 4、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 ---stopped 5、不规则动词的过去式变化规律性不强,须多加记忆.go – went make – made get – got buy - bought come - came fly-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—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 过去式“-ed”的发音规则 (1)动词词尾为“t,d”时,发/ id /音,want →wanted (要)need →needed (需要) (2)动词词尾为清辅音时,发/ t / 音.help →helped (帮助)laugh →laughed (笑)look →looked (看) kiss →kissed (吻)wash →washed (洗) watch →watched (注视) (3)动词词尾为t,d以外之浊辅音或元音时,发/ d /音.call →called (叫)stay→stayed (停留)cry→cried (哭)。
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