The Browns have worked here since 2002．How long have the Browns worked here? 题目和参考答案——青夏教育精英家教网—

17．The Browns have worked here since 2002．（对划线部分提问）
How long have the Browns worked here？

分析 --布朗一家自从2002年就已经在这工作了．
--布朗一家在这工作多长时间了？

解答答案：How long．考查划线部分提问．句意"--布朗一家自从2002年就已经在这工作了．--布朗一家在这工作多长时间了？"．对since+点时间提问，用how long，表示多长时间，多久．剩下的变为一般疑问句，助动词have提前．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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