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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：...

sell—sold,tell—told10.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,...

11．以ould结尾且读音为〔ud〕的情态动词过去式.如：can—could,shall—should,will—would2．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：he...

11．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。

11.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:e—came,bee—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〕—...

-opened以不发音字母E结尾指加D。close-closed以重读闭音节结尾，且只有一个辅音字母双写辅音字母再加ed.stop-stopped以辅音字母加Y结尾，把Y改成I再加ed.study-studied不规则变化要牢记...

11．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。

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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:e—came,bee—...