题目内容
19．Sally's been to Beijing twice， ？（ ）| A． | has she | B． | doesn't she | C． | isn't she | D． | hasn't she |
分析 Sally已经去过北京两次了，是吗？
解答 答案：D．根据Sally's been to Beijing twice， ？可知本句考查了反意疑问句，反意疑问句由两个部分组成"助动词/系动词/情态动词+代词"，前面是肯定句，后面就用否定；前面是否定句，后面就用肯定；前面句子所使用的时态是现在完成时，由have/has+动词的过去分词构成，本句出现了助动词has，所以此处要用has的否定形式hasn't，Sally用相应的代词she来代替．故选D．
点评 此题考查反意疑问句，先明确反意疑问句的构成，再找出相应的助动词/系动词/情态动词，再根据"前肯定，后否定；前否定，后肯定"来判断用什么形式．
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