ought to dupe
Regular verb: dupe - duped- duped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to dupe
you ought to dupe
he ought to dupe
we ought to dupe
you ought to dupe
they ought to dupe 	I ought to be duping
you ought to be duping
he ought to be duping
we ought to be duping
you ought to be duping
they ought to be duping	I ought to have duped
you ought to have duped
he ought to have duped
we ought to have duped
you ought to have duped
they ought to have duped	I ought to have been duping
you ought to have been duping
he ought to have been duping
we ought to have been duping
you ought to have been duping
they ought to have been duping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to dupe
you oughtn't to dupe
he oughtn't to dupe
we oughtn't to dupe
you oughtn't to dupe
they oughtn't to dupe 	I oughtn't to be duping
you oughtn't to be duping
he oughtn't to be duping
we oughtn't to be duping
you oughtn't to be duping
they oughtn't to be duping	I oughtn't to have duped
you oughtn't to have duped
he oughtn't to have duped
we oughtn't to have duped
you oughtn't to have duped
they oughtn't to have duped	I oughtn't to have been duping
you oughtn't to have been duping
he oughtn't to have been duping
we oughtn't to have been duping
you oughtn't to have been duping
they oughtn't to have been duping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I dupe?
ought to you dupe?
ought to he dupe?
ought to we dupe?
ought to you dupe?
ought to they dupe? 	ought to I be duping?
ought to you be duping?
ought to he be duping?
ought to we be duping?
ought to you be duping?
ought to they be duping? 	ought to I have duped?
ought to you have duped?
ought to he have duped?
ought to we have duped?
ought to you have duped?
ought to they have duped? 	ought to I have been duping?
ought to you have been duping?
ought to he have been duping?
ought to we have been duping?
ought to you have been duping?
ought to they have been duping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to dupe?
oughtn't you to dupe?
oughtn't he to dupe?
oughtn't we to dupe?
oughtn't you to dupe?
oughtn't they to dupe? 	oughtn't I to be duping?
oughtn't you to be duping?
oughtn't he to be duping?
oughtn't we to be duping?
oughtn't you to be duping?
oughtn't they to be duping? 	oughtn't I to have duped?
oughtn't you to have duped?
oughtn't he to have duped?
oughtn't we to have duped?
oughtn't you to have duped?
oughtn't they to have duped? 	oughtn't I to have been duping?
oughtn't you to have been duping?
oughtn't he to have been duping?
oughtn't we to have been duping?
oughtn't you to have been duping?
oughtn't they to have been duping?