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 must not illustrate
you must not illustrate
she must not illustrate
we must not illustrate
you must not illustrate
they must not illustrate 	I must not be illustrating
you must not be illustrating
she must not be illustrating
we must not be illustrating
you must not be illustrating
they must not be illustrating	I must not have illustrated
you must not have illustrated
she must not have illustrated
we must not have illustrated
you must not have illustrated
they must not have illustrated	I must not have been illustrating
you must not have been illustrating
she must not have been illustrating
we must not have been illustrating
you must not have been illustrating
they must not 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 	
must I not illustrate?
must you not illustrate?
must she not illustrate?
must we not illustrate?
must you not illustrate?
must they not illustrate? 	must I not be illustrating?
must you not be illustrating?
must she not be illustrating?
must we not be illustrating?
must you not be illustrating?
must they not be illustrating? 	must I not have illustrated?
must you not have illustrated?
must she not have illustrated?
must we not have illustrated?
must you not have illustrated?
must they not have illustrated? 	must I not have been illustrating?
must you not have been illustrating?
must she not have been illustrating?
must we not have been illustrating?
must you not have been illustrating?
must they not have been illustrating?