must underexercise
Verbe régulier : underexercise - underexercised- underexercised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must underexercise
you must underexercise
she must underexercise
we must underexercise
you must underexercise
they must underexercise 	I must be underexercising
you must be underexercising
she must be underexercising
we must be underexercising
you must be underexercising
they must be underexercising	I must have underexercised
you must have underexercised
she 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
she must have been underexercising
we must have been underexercising
you must have been underexercising
they must have been underexercising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't underexercise
you mustn't underexercise
she 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
she 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
she 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
she mustn't have been underexercising
we mustn't have been underexercising
you mustn't have been underexercising
they mustn't have been underexercising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I underexercise?
must you underexercise?
must she underexercise?
must we underexercise?
must you underexercise?
must they underexercise? 	must I be underexercising?
must you be underexercising?
must she be underexercising?
must we be underexercising?
must you be underexercising?
must they be underexercising? 	must I have underexercised?
must you have underexercised?
must she 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 she have been underexercising?
must we have been underexercising?
must you have been underexercising?
must they have been underexercising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I underexercise?
mustn't you underexercise?
mustn't she 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 she 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 she 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 she have been underexercising?
mustn't we have been underexercising?
mustn't you have been underexercising?
mustn't they have been underexercising?