题目内容：

there be句型中带情态动词的完成时态的反意疑问句
如There must have been more than three hundred students in our school ten years ago.
这一句话的疑问部分是“Isn't there?”还是别的什么?
请给予详细讲解.

优质解答

正确答案应该是 weren't there?there be 的反义疑问句用 相应的谓语动词+there(省略主语代词）D．must表示推测 ,其疑问部分必须与must 后面的主要动词相呼应.如：①对现在动作或存在的情况的推测 ：You must know th...