must institute
Verbo regular: institute - instituted- instituted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not institute
you must not institute
he must not institute
we must not institute
you must not institute
they must not institute 	I must not be instituting
you must not be instituting
he must not be instituting
we must not be instituting
you must not be instituting
they must not be instituting	I must not have instituted
you must not have instituted
he must not have instituted
we must not have instituted
you must not have instituted
they must not have instituted	I must not have been instituting
you must not have been instituting
he must not have been instituting
we must not have been instituting
you must not have been instituting
they must not have been instituting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not institute?
must you not institute?
must he not institute?
must we not institute?
must you not institute?
must they not institute? 	must I not be instituting?
must you not be instituting?
must he not be instituting?
must we not be instituting?
must you not be instituting?
must they not be instituting? 	must I not have instituted?
must you not have instituted?
must he not have instituted?
must we not have instituted?
must you not have instituted?
must they not have instituted? 	must I not have been instituting?
must you not have been instituting?
must he not have been instituting?
must we not have been instituting?
must you not have been instituting?
must they not have been instituting?