must institute
Regular verb: institute - instituted- instituted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must institute
you must institute
he must institute
we must institute
you must institute
they must institute 	I must be instituting
you must be instituting
he must be instituting
we must be instituting
you must be instituting
they must be instituting	I must have instituted
you must have instituted
he must have instituted
we must have instituted
you must have instituted
they must have instituted	I must have been instituting
you must have been instituting
he must have been instituting
we must have been instituting
you must have been instituting
they must have been instituting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't institute
you mustn't institute
he mustn't institute
we mustn't institute
you mustn't institute
they mustn't institute 	I mustn't be instituting
you mustn't be instituting
he mustn't be instituting
we mustn't be instituting
you mustn't be instituting
they mustn't be instituting	I mustn't have instituted
you mustn't have instituted
he mustn't have instituted
we mustn't have instituted
you mustn't have instituted
they mustn't have instituted	I mustn't have been instituting
you mustn't have been instituting
he mustn't have been instituting
we mustn't have been instituting
you mustn't have been instituting
they mustn't have been instituting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I institute?
must you institute?
must he institute?
must we institute?
must you institute?
must they institute? 	must I be instituting?
must you be instituting?
must he be instituting?
must we be instituting?
must you be instituting?
must they be instituting? 	must I have instituted?
must you have instituted?
must he have instituted?
must we have instituted?
must you have instituted?
must they have instituted? 	must I have been instituting?
must you have been instituting?
must he have been instituting?
must we have been instituting?
must you have been instituting?
must they have been instituting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I institute?
mustn't you institute?
mustn't he institute?
mustn't we institute?
mustn't you institute?
mustn't they institute? 	mustn't I be instituting?
mustn't you be instituting?
mustn't he be instituting?
mustn't we be instituting?
mustn't you be instituting?
mustn't they be instituting? 	mustn't I have instituted?
mustn't you have instituted?
mustn't he have instituted?
mustn't we have instituted?
mustn't you have instituted?
mustn't they have instituted? 	mustn't I have been instituting?
mustn't you have been instituting?
mustn't he have been instituting?
mustn't we have been instituting?
mustn't you have been instituting?
mustn't they have been instituting?