题目内容
17．It takes us about 10minutes to get to school on foot．（就划线部分提问）How longdoes it take you to get to school on foot？
分析 --步行到学校花费我们大约10分钟的时间．
--步行到学校花费你们多长时间？
解答 答案：How long．考查划线部分提问．根据10 minutes十分钟，可知对表示一段时间提问用how long多长时间．剩下变为一般疑问句，一般现在时态，用助动词does．实义动词变原形take，第一人称us变为第二人称you．答案是How long．
点评 对划线部分提问，要根据划线部分内容选择合适的疑问词，剩下的变为一般疑问句．注意区分疑问词的用法．会正确运用一般疑问句用法．
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