there must be many people dancing 变反意疑问句?

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there must be many people dancing 变反意疑问句?

there must be many people dancing 变反意疑问句?
there must be many people dancing 变反意疑问句?

there must be many people dancing 变反意疑问句?
There must be many people dancing, aren't there?
当must用来表示对现在的情况进行“推测”时,反意疑问部分要根据must后面的动词采用相应的形式.
例 He must be good at maths, isn’t he? 他数学一定学得很好,是吗?