English verb conjugation
MUST SUFFICE

Regular verb: suffice - sufficed - sufficed

Affirmation

Simple form	V-ing form
I must suffice you must suffice he must suffice we must suffice you must suffice they must suffice	I must be sufficing you must be sufficing he must be sufficing we must be sufficing you must be sufficing they must be sufficing
Perfect	V-ing perfect
I must have sufficed you must have sufficed he must have sufficed we must have sufficed you must have sufficed they must have sufficed	I must have been sufficing you must have been sufficing he must have been sufficing we must have been sufficing you must have been sufficing they must have been sufficing

Negation

Simple form	V-ing form
I mustn't suffice you mustn't suffice he mustn't suffice we mustn't suffice you mustn't suffice they mustn't suffice	I mustn't be sufficing you mustn't be sufficing he mustn't be sufficing we mustn't be sufficing you mustn't be sufficing they mustn't be sufficing
Perfect	V-ing perfect
I mustn't have sufficed you mustn't have sufficed he mustn't have sufficed we mustn't have sufficed you mustn't have sufficed they mustn't have sufficed	I mustn't have been sufficing you mustn't have been sufficing he mustn't have been sufficing we mustn't have been sufficing you mustn't have been sufficing they mustn't have been sufficing

Interrogative form

Simple form	V-ing form
must I suffice? must you suffice? must he suffice? must we suffice? must you suffice? must they suffice?	must I be sufficing? must you be sufficing? must he be sufficing? must we be sufficing? must you be sufficing? must they be sufficing?
Perfect	V-ing perfect
must I have sufficed? must you have sufficed? must he have sufficed? must we have sufficed? must you have sufficed? must they have sufficed?	must I have been sufficing? must you have been sufficing? must he have been sufficing? must we have been sufficing? must you have been sufficing? must they have been sufficing?

Interro-negative form

Simple form	V-ing form
mustn't I suffice? mustn't you suffice? mustn't he suffice? mustn't we suffice? mustn't you suffice? mustn't they suffice?	mustn't I be sufficing? mustn't you be sufficing? mustn't he be sufficing? mustn't we be sufficing? mustn't you be sufficing? mustn't they be sufficing?
Perfect	V-ing perfect
mustn't I have sufficed? mustn't you have sufficed? mustn't he have sufficed? mustn't we have sufficed? mustn't you have sufficed? mustn't they have sufficed?	mustn't I have been sufficing? mustn't you have been sufficing? mustn't he have been sufficing? mustn't we have been sufficing? mustn't you have been sufficing? mustn't they have been sufficing?