must institute
Verbo regular: institute - instituted- instituted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must institute
you must institute
she must institute
we must institute
you must institute
they must institute 	I must be instituting
you must be instituting
she must be instituting
we must be instituting
you must be instituting
they must be instituting	I must have instituted
you must have instituted
she 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
she must have been instituting
we must have been instituting
you must have been instituting
they must have been instituting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't institute
you mustn't institute
she 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
she 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
she 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
she mustn't have been instituting
we mustn't have been instituting
you mustn't have been instituting
they mustn't have been instituting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I institute?
must you institute?
must she institute?
must we institute?
must you institute?
must they institute? 	must I be instituting?
must you be instituting?
must she be instituting?
must we be instituting?
must you be instituting?
must they be instituting? 	must I have instituted?
must you have instituted?
must she 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 she have been instituting?
must we have been instituting?
must you have been instituting?
must they have been instituting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I institute?
mustn't you institute?
mustn't she 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 she 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 she 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 she have been instituting?
mustn't we have been instituting?
mustn't you have been instituting?
mustn't they have been instituting?