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 ought not to dupe
you ought not to dupe
he ought not to dupe
we ought not to dupe
you ought not to dupe
they ought not to dupe 	I ought not to duping
you ought not to duping
he ought not to duping
we ought not to duping
you ought not to duping
they ought not to duping	I ought not to have duped
you ought not to have duped
he ought not to have duped
we ought not to have duped
you ought not to have duped
they ought not to have duped	I ought not to have been duping
you ought not to have been duping
he ought not to have been duping
we ought not to have been duping
you ought not to have been duping
they ought not 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 	
ought I not to dupe?
ought you not to dupe?
ought he not to dupe?
ought we not to dupe?
ought you not to dupe?
ought they not to dupe? 	ought I not to be duping?
ought you not to be duping?
ought he not to be duping?
ought we not to be duping?
ought you not to be duping?
ought they not to be duping? 	ought I not to have duped?
ought you not to have duped?
ought he not to have duped?
ought we not to have duped?
ought you not to have duped?
ought they not to have duped? 	ought I not to have been duping?
ought you not to have been duping?
ought he not to have been duping?
ought we not to have been duping?
ought you not to have been duping?
ought they not to have been duping?