must demonstrate
Verbo regular: demonstrate - demonstrated- demonstrated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must demonstrate
you must demonstrate
he must demonstrate
we must demonstrate
you must demonstrate
they must demonstrate 	I must be demonstrating
you must be demonstrating
he must be demonstrating
we must be demonstrating
you must be demonstrating
they must be demonstrating	I must have demonstrated
you must have demonstrated
he must have demonstrated
we must have demonstrated
you must have demonstrated
they must have demonstrated	I must have been demonstrating
you must have been demonstrating
he must have been demonstrating
we must have been demonstrating
you must have been demonstrating
they must have been demonstrating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't demonstrate
you mustn't demonstrate
he mustn't demonstrate
we mustn't demonstrate
you mustn't demonstrate
they mustn't demonstrate 	I mustn't be demonstrating
you mustn't be demonstrating
he mustn't be demonstrating
we mustn't be demonstrating
you mustn't be demonstrating
they mustn't be demonstrating	I mustn't have demonstrated
you mustn't have demonstrated
he mustn't have demonstrated
we mustn't have demonstrated
you mustn't have demonstrated
they mustn't have demonstrated	I mustn't have been demonstrating
you mustn't have been demonstrating
he mustn't have been demonstrating
we mustn't have been demonstrating
you mustn't have been demonstrating
they mustn't have been demonstrating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I demonstrate?
must you demonstrate?
must he demonstrate?
must we demonstrate?
must you demonstrate?
must they demonstrate? 	must I be demonstrating?
must you be demonstrating?
must he be demonstrating?
must we be demonstrating?
must you be demonstrating?
must they be demonstrating? 	must I have demonstrated?
must you have demonstrated?
must he have demonstrated?
must we have demonstrated?
must you have demonstrated?
must they have demonstrated? 	must I have been demonstrating?
must you have been demonstrating?
must he have been demonstrating?
must we have been demonstrating?
must you have been demonstrating?
must they have been demonstrating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I demonstrate?
mustn't you demonstrate?
mustn't he demonstrate?
mustn't we demonstrate?
mustn't you demonstrate?
mustn't they demonstrate? 	mustn't I be demonstrating?
mustn't you be demonstrating?
mustn't he be demonstrating?
mustn't we be demonstrating?
mustn't you be demonstrating?
mustn't they be demonstrating? 	mustn't I have demonstrated?
mustn't you have demonstrated?
mustn't he have demonstrated?
mustn't we have demonstrated?
mustn't you have demonstrated?
mustn't they have demonstrated? 	mustn't I have been demonstrating?
mustn't you have been demonstrating?
mustn't he have been demonstrating?
mustn't we have been demonstrating?
mustn't you have been demonstrating?
mustn't they have been demonstrating?