题目内容
10.Robert used to take a bus work.(改为一般疑问句)Did Robertuse to take a bus to work.
分析 罗伯特过去乘坐公共汽车去上班.
罗伯特过去乘坐公共汽车去上班吗?
解答 答案:Did; use.used to do sth表示过去常常,一般疑问句借助于did,后加动词原形use,故答案是Did; use.
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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