[英语最常用的30个句子]1. Hello! 2. Good moring. 3. How are you? 4. what is your name? 5. How old are you? 6. See you later! 7. bye-bye. 8. Have a nice day! 9. Can you do me a favor?...+阅读
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
2.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动词的过去式
延伸阅读：
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