English verb conjugation
MUST INFLECT

Regular verb: inflect - inflected - inflected

Affirmation

Simple form	V-ing form
I must inflect you must inflect he must inflect we must inflect you must inflect they must inflect	I must be inflecting you must be inflecting he must be inflecting we must be inflecting you must be inflecting they must be inflecting
Perfect	V-ing perfect
I must have inflected you must have inflected he must have inflected we must have inflected you must have inflected they must have inflected	I must have been inflecting you must have been inflecting he must have been inflecting we must have been inflecting you must have been inflecting they must have been inflecting

Negation

Simple form	V-ing form
I mustn't inflect you mustn't inflect he mustn't inflect we mustn't inflect you mustn't inflect they mustn't inflect	I mustn't be inflecting you mustn't be inflecting he mustn't be inflecting we mustn't be inflecting you mustn't be inflecting they mustn't be inflecting
Perfect	V-ing perfect
I mustn't have inflected you mustn't have inflected he mustn't have inflected we mustn't have inflected you mustn't have inflected they mustn't have inflected	I mustn't have been inflecting you mustn't have been inflecting he mustn't have been inflecting we mustn't have been inflecting you mustn't have been inflecting they mustn't have been inflecting

Interrogative form

Simple form	V-ing form
must I inflect? must you inflect? must he inflect? must we inflect? must you inflect? must they inflect?	must I be inflecting? must you be inflecting? must he be inflecting? must we be inflecting? must you be inflecting? must they be inflecting?
Perfect	V-ing perfect
must I have inflected? must you have inflected? must he have inflected? must we have inflected? must you have inflected? must they have inflected?	must I have been inflecting? must you have been inflecting? must he have been inflecting? must we have been inflecting? must you have been inflecting? must they have been inflecting?

Interro-negative form

Simple form	V-ing form
mustn't I inflect? mustn't you inflect? mustn't he inflect? mustn't we inflect? mustn't you inflect? mustn't they inflect?	mustn't I be inflecting? mustn't you be inflecting? mustn't he be inflecting? mustn't we be inflecting? mustn't you be inflecting? mustn't they be inflecting?
Perfect	V-ing perfect
mustn't I have inflected? mustn't you have inflected? mustn't he have inflected? mustn't we have inflected? mustn't you have inflected? mustn't they have inflected?	mustn't I have been inflecting? mustn't you have been inflecting? mustn't he have been inflecting? mustn't we have been inflecting? mustn't you have been inflecting? mustn't they have been inflecting?