Are they natural? Do they make sense?

When we talk about probability using must or may, might, could, can we make yes/no questions and tag question? Example: 1 Must he be at home? / (Mustn’t) Must he not be at home? 2 Might he be at home? / Might he not be at home? 3 May he be at home? / May he not be at home? 4 Could he be at home? / Can’t... show more When we talk about probability using must or may, might, could, can we make yes/no questions and tag question?

Example:
1 Must he be at home? / (Mustn’t) Must he not be at home?
2 Might he be at home? / Might he not be at home?
3 May he be at home? / May he not be at home?
4 Could he be at home? / Can’t he be at home?

5 He must be at home, mustn't he? / He mustn’t be at home, must he?
6 He might be at home, might he not? / He might not be at home, might he?
7 He may be at home, may he not? / He may not be at home, may he?
8 He could be at home, couldn’t he? / He can’t be at home, can he?

Are they natural? Do they make sense?
Thanks a million!
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