must underexercise
Verbo regular: underexercise - underexercised- underexercised

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must underexercise
you must underexercise
he must underexercise
we must underexercise
you must underexercise
they must underexercise 	I must be underexercising
you must be underexercising
he must be underexercising
we must be underexercising
you must be underexercising
they must be underexercising	I must have underexercised
you must have underexercised
he must have underexercised
we must have underexercised
you must have underexercised
they must have underexercised	I must have been underexercising
you must have been underexercising
he must have been underexercising
we must have been underexercising
you must have been underexercising
they must have been underexercising	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't underexercise
you mustn't underexercise
he mustn't underexercise
we mustn't underexercise
you mustn't underexercise
they mustn't underexercise 	I mustn't be underexercising
you mustn't be underexercising
he mustn't be underexercising
we mustn't be underexercising
you mustn't be underexercising
they mustn't be underexercising	I mustn't have underexercised
you mustn't have underexercised
he mustn't have underexercised
we mustn't have underexercised
you mustn't have underexercised
they mustn't have underexercised	I mustn't have been underexercising
you mustn't have been underexercising
he mustn't have been underexercising
we mustn't have been underexercising
you mustn't have been underexercising
they mustn't have been underexercising	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I underexercise?
must you underexercise?
must he underexercise?
must we underexercise?
must you underexercise?
must they underexercise? 	must I be underexercising?
must you be underexercising?
must he be underexercising?
must we be underexercising?
must you be underexercising?
must they be underexercising? 	must I have underexercised?
must you have underexercised?
must he have underexercised?
must we have underexercised?
must you have underexercised?
must they have underexercised? 	must I have been underexercising?
must you have been underexercising?
must he have been underexercising?
must we have been underexercising?
must you have been underexercising?
must they have been underexercising? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I underexercise?
mustn't you underexercise?
mustn't he underexercise?
mustn't we underexercise?
mustn't you underexercise?
mustn't they underexercise? 	mustn't I be underexercising?
mustn't you be underexercising?
mustn't he be underexercising?
mustn't we be underexercising?
mustn't you be underexercising?
mustn't they be underexercising? 	mustn't I have underexercised?
mustn't you have underexercised?
mustn't he have underexercised?
mustn't we have underexercised?
mustn't you have underexercised?
mustn't they have underexercised? 	mustn't I have been underexercising?
mustn't you have been underexercising?
mustn't he have been underexercising?
mustn't we have been underexercising?
mustn't you have been underexercising?
mustn't they have been underexercising?