must mature
Regular verb: mature - matured- matured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must mature
you must mature
he must mature
we must mature
you must mature
they must mature 	I must be maturing
you must be maturing
he must be maturing
we must be maturing
you must be maturing
they must be maturing	I must have matured
you must have matured
he must have matured
we must have matured
you must have matured
they must have matured	I must have been maturing
you must have been maturing
he must have been maturing
we must have been maturing
you must have been maturing
they must have been maturing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't mature
you mustn't mature
he mustn't mature
we mustn't mature
you mustn't mature
they mustn't mature 	I mustn't be maturing
you mustn't be maturing
he mustn't be maturing
we mustn't be maturing
you mustn't be maturing
they mustn't be maturing	I mustn't have matured
you mustn't have matured
he mustn't have matured
we mustn't have matured
you mustn't have matured
they mustn't have matured	I mustn't have been maturing
you mustn't have been maturing
he mustn't have been maturing
we mustn't have been maturing
you mustn't have been maturing
they mustn't have been maturing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I mature?
must you mature?
must he mature?
must we mature?
must you mature?
must they mature? 	must I be maturing?
must you be maturing?
must he be maturing?
must we be maturing?
must you be maturing?
must they be maturing? 	must I have matured?
must you have matured?
must he have matured?
must we have matured?
must you have matured?
must they have matured? 	must I have been maturing?
must you have been maturing?
must he have been maturing?
must we have been maturing?
must you have been maturing?
must they have been maturing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I mature?
mustn't you mature?
mustn't he mature?
mustn't we mature?
mustn't you mature?
mustn't they mature? 	mustn't I be maturing?
mustn't you be maturing?
mustn't he be maturing?
mustn't we be maturing?
mustn't you be maturing?
mustn't they be maturing? 	mustn't I have matured?
mustn't you have matured?
mustn't he have matured?
mustn't we have matured?
mustn't you have matured?
mustn't they have matured? 	mustn't I have been maturing?
mustn't you have been maturing?
mustn't he have been maturing?
mustn't we have been maturing?
mustn't you have been maturing?
mustn't they have been maturing?