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高中英语语法新体验——从经典例句开始
1.6.12.4 4.带有推测性情态动词句子的附加疑问句

4.带有推测性情态动词句子的附加疑问句

正因为如此,在表示推测性用法的句子后面加上附加疑问句时,不对情态动词而对不定式的实际时态提问。

There must be some mistake,isn't there?

It must be a D,isn't it?

You can't be serious,are you?

You must be joking,aren't you?

It might have rained that day,didn't it?

You must have been sleeping when I called,weren't you?

You may have been watching TV the whole day,haven't you?

That would be the headmaster,isn't it?