must undervalue
Verbe régulier : undervalue - undervalued- undervalued
Traduction française : sous-évaluer - sous-estimer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must undervalue
you must undervalue
he must undervalue
we must undervalue
you must undervalue
they must undervalue 	I must be undervaluing
you must be undervaluing
he must be undervaluing
we must be undervaluing
you must be undervaluing
they must be undervaluing	I must have undervalued
you must have undervalued
he must have undervalued
we must have undervalued
you must have undervalued
they must have undervalued	I must have been undervaluing
you must have been undervaluing
he must have been undervaluing
we must have been undervaluing
you must have been undervaluing
they must have been undervaluing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not undervalue
you must not undervalue
he must not undervalue
we must not undervalue
you must not undervalue
they must not undervalue 	I must not be undervaluing
you must not be undervaluing
he must not be undervaluing
we must not be undervaluing
you must not be undervaluing
they must not be undervaluing	I must not have undervalued
you must not have undervalued
he must not have undervalued
we must not have undervalued
you must not have undervalued
they must not have undervalued	I must not have been undervaluing
you must not have been undervaluing
he must not have been undervaluing
we must not have been undervaluing
you must not have been undervaluing
they must not have been undervaluing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I undervalue?
must you undervalue?
must he undervalue?
must we undervalue?
must you undervalue?
must they undervalue? 	must I be undervaluing?
must you be undervaluing?
must he be undervaluing?
must we be undervaluing?
must you be undervaluing?
must they be undervaluing? 	must I have undervalued?
must you have undervalued?
must he have undervalued?
must we have undervalued?
must you have undervalued?
must they have undervalued? 	must I have been undervaluing?
must you have been undervaluing?
must he have been undervaluing?
must we have been undervaluing?
must you have been undervaluing?
must they have been undervaluing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not undervalue?
must you not undervalue?
must he not undervalue?
must we not undervalue?
must you not undervalue?
must they not undervalue? 	must I not be undervaluing?
must you not be undervaluing?
must he not be undervaluing?
must we not be undervaluing?
must you not be undervaluing?
must they not be undervaluing? 	must I not have undervalued?
must you not have undervalued?
must he not have undervalued?
must we not have undervalued?
must you not have undervalued?
must they not have undervalued? 	must I not have been undervaluing?
must you not have been undervaluing?
must he not have been undervaluing?
must we not have been undervaluing?
must you not have been undervaluing?
must they not have been undervaluing?