Modality As Predicator

he	will	have to resign	won’t	he
Subject	Finite	Predicator	Finite	Subject
Mood		Residue	Mood Tag

cf

he	had		to resign	didn’t	he
	‘past	have to resign’
Subject	Finite	Predicator		Finite	Subject
Mood		Residue		Mood Tag

cf

he	did	have to resign	didn’t	he
Subject	Finite	Predicator	Finite	Subject
Mood		Residue	Mood Tag