must illustrate
Regular verb: illustrate - illustrated- illustrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must illustrate
you must illustrate
she must illustrate
we must illustrate
you must illustrate
they must illustrate 	I must be illustrating
you must be illustrating
she must be illustrating
we must be illustrating
you must be illustrating
they must be illustrating	I must have illustrated
you must have illustrated
she must have illustrated
we must have illustrated
you must have illustrated
they must have illustrated	I must have been illustrating
you must have been illustrating
she must have been illustrating
we must have been illustrating
you must have been illustrating
they must have been illustrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't illustrate
you mustn't illustrate
she mustn't illustrate
we mustn't illustrate
you mustn't illustrate
they mustn't illustrate 	I mustn't be illustrating
you mustn't be illustrating
she mustn't be illustrating
we mustn't be illustrating
you mustn't be illustrating
they mustn't be illustrating	I mustn't have illustrated
you mustn't have illustrated
she mustn't have illustrated
we mustn't have illustrated
you mustn't have illustrated
they mustn't have illustrated	I mustn't have been illustrating
you mustn't have been illustrating
she mustn't have been illustrating
we mustn't have been illustrating
you mustn't have been illustrating
they mustn't have been illustrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I illustrate?
must you illustrate?
must she illustrate?
must we illustrate?
must you illustrate?
must they illustrate? 	must I be illustrating?
must you be illustrating?
must she be illustrating?
must we be illustrating?
must you be illustrating?
must they be illustrating? 	must I have illustrated?
must you have illustrated?
must she have illustrated?
must we have illustrated?
must you have illustrated?
must they have illustrated? 	must I have been illustrating?
must you have been illustrating?
must she have been illustrating?
must we have been illustrating?
must you have been illustrating?
must they have been illustrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I illustrate?
mustn't you illustrate?
mustn't she illustrate?
mustn't we illustrate?
mustn't you illustrate?
mustn't they illustrate? 	mustn't I be illustrating?
mustn't you be illustrating?
mustn't she be illustrating?
mustn't we be illustrating?
mustn't you be illustrating?
mustn't they be illustrating? 	mustn't I have illustrated?
mustn't you have illustrated?
mustn't she have illustrated?
mustn't we have illustrated?
mustn't you have illustrated?
mustn't they have illustrated? 	mustn't I have been illustrating?
mustn't you have been illustrating?
mustn't she have been illustrating?
mustn't we have been illustrating?
mustn't you have been illustrating?
mustn't they have been illustrating?