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when did you bring it to us前面did后面为何不变成brought过去式

题目详情
when did you bring it to us
前面did后面为何不变成brought过去式
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答案和解析
一般疑问句:在句首加did,句子中的动词过去式变回原形.如:Did Jim go home yesterday?特殊疑问句:⑴疑问词+did+主语+动词原形?如:What did Jim do yesterday?⑵疑问词当主语时:疑问词+动词过去式?如:Who went to home yesterday?
还有比如does也是一样的