题目内容
2.He must be helping the old man to water the flowers, ?( )A. | is he | B. | isn't he | C. | must he | D. | mustn't he |
分析 他肯定在帮助老人浇花,对吗?
解答 答案是B.本题考查含推测的情态动词的反义问句.反义问句的基本结构是"陈述句+简略疑问句?",疑问句中的主语和助动词与陈述句一致;当陈述句含推测的情态动词时,疑问句中的助动词的判断方法是"去掉表示推测的情态动词,将句子还原";本句还原为"He is helping the old man to water the flowers",可见还原后的句子中含助动词is,所以助动词用is;陈述句用肯定句,疑问部分用否定,答案选择B.
点评 反意疑问句的解题,首先理解反意疑问句的作用--证实上文的内容;其次理解反意疑问句的基本结构;并且积累常见的特殊结构,最后结合语境判断.
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