55.Obligation
DUTY
INTERDICTION
ABSENCE OF OBLIGATION
He must do this.
1
2
3
4
He is supposed to do this.
He has to do this.
He mustn’t do this.
He isn’t supposed to do this.
He isn’t allowed to do this.
5
6
7
He doesn’t have to do this.
He doesn’t need to do this.
He needn’t do this.
8
9