Dare:
• defy or challenge (someone) to do something.
•She was daring him to disagree.
Must:
• be obliged to; should (expressing necessity).
• You must show your ID card.
Ought to:
• used to indicate duty or correctness, typically when criticizing someone's actions.
• They ought to respect the law.
May:
• Expressing possibility, that may be true.
• used to ask for or to give permission.
• You may confirm my identity, with your Case Officer, if you wish.
