The speaker's attitudes and intentions
Can, may, must and want to
Obligation
Must it happen? Is it required?
பொருள்
A modal layer expressing necessity, duty, rule, requirement, pressure, or unavoidable need.
இதைக் கண்டறிவது எப்படி
Ask whether someone has to do something.
Visual guide
Obligation layer:
[person] → [event]
↑
rule / duty / need
must / have to / need to
You have to finish this today.