ought to undervalue
Regular verb: undervalue - undervalued- undervalued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to undervalue
you ought to undervalue
she ought to undervalue
we ought to undervalue
you ought to undervalue
they ought to undervalue 	I ought to be undervaluing
you ought to be undervaluing
she ought to be undervaluing
we ought to be undervaluing
you ought to be undervaluing
they ought to be undervaluing	I ought to have undervalued
you ought to have undervalued
she ought to have undervalued
we ought to have undervalued
you ought to have undervalued
they ought to have undervalued	I ought to have been undervaluing
you ought to have been undervaluing
she ought to have been undervaluing
we ought to have been undervaluing
you ought to have been undervaluing
they ought to have been undervaluing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to undervalue
you oughtn't to undervalue
she oughtn't to undervalue
we oughtn't to undervalue
you oughtn't to undervalue
they oughtn't to undervalue 	I oughtn't to be undervaluing
you oughtn't to be undervaluing
she oughtn't to be undervaluing
we oughtn't to be undervaluing
you oughtn't to be undervaluing
they oughtn't to be undervaluing	I oughtn't to have undervalued
you oughtn't to have undervalued
she oughtn't to have undervalued
we oughtn't to have undervalued
you oughtn't to have undervalued
they oughtn't to have undervalued	I oughtn't to have been undervaluing
you oughtn't to have been undervaluing
she oughtn't to have been undervaluing
we oughtn't to have been undervaluing
you oughtn't to have been undervaluing
they oughtn't to have been undervaluing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I undervalue?
ought to you undervalue?
ought to she undervalue?
ought to we undervalue?
ought to you undervalue?
ought to they undervalue? 	ought to I be undervaluing?
ought to you be undervaluing?
ought to she be undervaluing?
ought to we be undervaluing?
ought to you be undervaluing?
ought to they be undervaluing? 	ought to I have undervalued?
ought to you have undervalued?
ought to she have undervalued?
ought to we have undervalued?
ought to you have undervalued?
ought to they have undervalued? 	ought to I have been undervaluing?
ought to you have been undervaluing?
ought to she have been undervaluing?
ought to we have been undervaluing?
ought to you have been undervaluing?
ought to they have been undervaluing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to undervalue?
oughtn't you to undervalue?
oughtn't she to undervalue?
oughtn't we to undervalue?
oughtn't you to undervalue?
oughtn't they to undervalue? 	oughtn't I to be undervaluing?
oughtn't you to be undervaluing?
oughtn't she to be undervaluing?
oughtn't we to be undervaluing?
oughtn't you to be undervaluing?
oughtn't they to be undervaluing? 	oughtn't I to have undervalued?
oughtn't you to have undervalued?
oughtn't she to have undervalued?
oughtn't we to have undervalued?
oughtn't you to have undervalued?
oughtn't they to have undervalued? 	oughtn't I to have been undervaluing?
oughtn't you to have been undervaluing?
oughtn't she to have been undervaluing?
oughtn't we to have been undervaluing?
oughtn't you to have been undervaluing?
oughtn't they to have been undervaluing?