ought to obscure
Regular verb: obscure - obscured- obscured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to obscure
you ought to obscure
he ought to obscure
we ought to obscure
you ought to obscure
they ought to obscure 	I ought to be obscuring
you ought to be obscuring
he ought to be obscuring
we ought to be obscuring
you ought to be obscuring
they ought to be obscuring	I ought to have obscured
you ought to have obscured
he ought to have obscured
we ought to have obscured
you ought to have obscured
they ought to have obscured	I ought to have been obscuring
you ought to have been obscuring
he ought to have been obscuring
we ought to have been obscuring
you ought to have been obscuring
they ought to have been obscuring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to obscure
you oughtn't to obscure
he oughtn't to obscure
we oughtn't to obscure
you oughtn't to obscure
they oughtn't to obscure 	I oughtn't to be obscuring
you oughtn't to be obscuring
he oughtn't to be obscuring
we oughtn't to be obscuring
you oughtn't to be obscuring
they oughtn't to be obscuring	I oughtn't to have obscured
you oughtn't to have obscured
he oughtn't to have obscured
we oughtn't to have obscured
you oughtn't to have obscured
they oughtn't to have obscured	I oughtn't to have been obscuring
you oughtn't to have been obscuring
he oughtn't to have been obscuring
we oughtn't to have been obscuring
you oughtn't to have been obscuring
they oughtn't to have been obscuring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I obscure?
ought to you obscure?
ought to he obscure?
ought to we obscure?
ought to you obscure?
ought to they obscure? 	ought to I be obscuring?
ought to you be obscuring?
ought to he be obscuring?
ought to we be obscuring?
ought to you be obscuring?
ought to they be obscuring? 	ought to I have obscured?
ought to you have obscured?
ought to he have obscured?
ought to we have obscured?
ought to you have obscured?
ought to they have obscured? 	ought to I have been obscuring?
ought to you have been obscuring?
ought to he have been obscuring?
ought to we have been obscuring?
ought to you have been obscuring?
ought to they have been obscuring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to obscure?
oughtn't you to obscure?
oughtn't he to obscure?
oughtn't we to obscure?
oughtn't you to obscure?
oughtn't they to obscure? 	oughtn't I to be obscuring?
oughtn't you to be obscuring?
oughtn't he to be obscuring?
oughtn't we to be obscuring?
oughtn't you to be obscuring?
oughtn't they to be obscuring? 	oughtn't I to have obscured?
oughtn't you to have obscured?
oughtn't he to have obscured?
oughtn't we to have obscured?
oughtn't you to have obscured?
oughtn't they to have obscured? 	oughtn't I to have been obscuring?
oughtn't you to have been obscuring?
oughtn't he to have been obscuring?
oughtn't we to have been obscuring?
oughtn't you to have been obscuring?
oughtn't they to have been obscuring?