analysing of 16 sentences

Dear teachers,

Would you be kind enough to make a analysis of the following sentences as well as to tell me whether there is a proper usage of the modal verbs?

1. Any one found guilty of robbery shall (should) be shot at once.
2. If you’re a good boy, you shall steer from time to time.
3. Why should he obey an order given him by a perfect stranger?
4. She pointed to the gramophone. “Shall I show you how to work it?”
5. I suppose I should have recognized that she was ill.
6. She should not have taken the corner at such speed.
7. They should have never married.
8. He should be willing to take it.
9. Shall I pull the blinds down.
10. It should be about five now.
11. The porter saw him enter. He should be somewhere here.
12. I think we should leave this young man behind.
13. But I think you should try.
14. Why should he say so if he doesn’t mean it?
15. She must have given him no opportunity to object.
16. She must be taking no trouble to do it right.

Thank you for your efforts.

Regards,

V.

1 Shall- if it's the law, it's OK Should- only if it's an opinion
2 If there's a good reason for using it, such as over-riding someone else's opposition to his steering.
16 'no end of trouble'??