题目内容
14.The teacher explained to us the puzzling problem yesterday afternoon.(改为一般疑问句)Did the teacherexplain to you the puzzling problem yesterday afternoon?
分析 老师昨天下午向我们解释了这个令人费解的问题.
老师昨天下午向你们解释了这个令人费解的问题了吗?
解答 答案:Did; explain;根据给出的句子The teacher explained to us the puzzling problem yesterday afternoon,它为一般过去时态,句中的explained为实意动词,把它变为一般疑问句需要用助动词did;后面的动词explain用原形;故填Did; explain.
点评 熟练掌握一般过去时态的一般疑问句的正确表达,结合句意容易作答.
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