must underrate
Verbe régulier : underrate - underrated- underrated
Traduction française : sous-estimer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must underrate
you must underrate
he must underrate
we must underrate
you must underrate
they must underrate 	I must be underrating
you must be underrating
he must be underrating
we must be underrating
you must be underrating
they must be underrating	I must have underrated
you must have underrated
he must have underrated
we must have underrated
you must have underrated
they must have underrated	I must have been underrating
you must have been underrating
he must have been underrating
we must have been underrating
you must have been underrating
they must have been underrating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't underrate
you mustn't underrate
he mustn't underrate
we mustn't underrate
you mustn't underrate
they mustn't underrate 	I mustn't be underrating
you mustn't be underrating
he mustn't be underrating
we mustn't be underrating
you mustn't be underrating
they mustn't be underrating	I mustn't have underrated
you mustn't have underrated
he mustn't have underrated
we mustn't have underrated
you mustn't have underrated
they mustn't have underrated	I mustn't have been underrating
you mustn't have been underrating
he mustn't have been underrating
we mustn't have been underrating
you mustn't have been underrating
they mustn't have been underrating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I underrate?
must you underrate?
must he underrate?
must we underrate?
must you underrate?
must they underrate? 	must I be underrating?
must you be underrating?
must he be underrating?
must we be underrating?
must you be underrating?
must they be underrating? 	must I have underrated?
must you have underrated?
must he have underrated?
must we have underrated?
must you have underrated?
must they have underrated? 	must I have been underrating?
must you have been underrating?
must he have been underrating?
must we have been underrating?
must you have been underrating?
must they have been underrating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I underrate?
mustn't you underrate?
mustn't he underrate?
mustn't we underrate?
mustn't you underrate?
mustn't they underrate? 	mustn't I be underrating?
mustn't you be underrating?
mustn't he be underrating?
mustn't we be underrating?
mustn't you be underrating?
mustn't they be underrating? 	mustn't I have underrated?
mustn't you have underrated?
mustn't he have underrated?
mustn't we have underrated?
mustn't you have underrated?
mustn't they have underrated? 	mustn't I have been underrating?
mustn't you have been underrating?
mustn't he have been underrating?
mustn't we have been underrating?
mustn't you have been underrating?
mustn't they have been underrating?