题目内容

17．They didn't arrive on time because they got up late．（对划线部分提问）      
Whydidn'tthey arrive on time？

分析 他们没有准时到达因为他们起的晚．
他们为什么没有准时到？

解答 答案：Why didn't．划线部分是because引导的原因状语从句，提问用疑问词why，这里是一般过去时的否定，借助于did构成一般疑问，故答案是Why didn't

点评 对划线部分提问要分析划线部分在句子中的成分，即可找出恰当的特殊疑问词．疑问词后一般疑问句语序．

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