must suffice
Regular verb: suffice - sufficed- sufficed

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