分析 Joe昨天在教室做作业.
Joe昨天在教室做作业了吗?
解答 答案:Did,do.原句did是动词do的过去式,是实意动词,改为一般疑问句的时候借助于助动词did放句首,后面加上动词原形do,故答案是Did,do.
点评 一、含有be动词(am/is/are/was/were)动词的一般疑问句,通常把be动词调到句首.
二、含有情态动词(can/may/must/could)的一般疑问句,把情态动词调到句首.
三、句子里没有be动词、助动词、情态动词等,就需要加助动词do,does,、did(过去式)来构成疑问句,加上这些助动词后,句子中谓语动词必须用原形.
其句型为:Do/Does/did+主语+动词原形+其它?
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