He must be helping the old man to water the flowers,______ ? A．is heB．isn’t - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

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

答案

解析

考查反意疑问句。陈述句中的谓语中虽有情态动词must，但此处must表示对正在进行的动作进行推测，将其不看作情态动词。而must后有助动词be，故反意疑问句根据助动词be来构成，选B。

核心考点

试题【He must be helping the old man to water the flowers,______ ? A．is heB．isn’t】；主要考察你对疑问句等知识点的理解。[详细]

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