ought to refute
Regular verb: refute - refuted- refuted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to refute
you ought to refute
he ought to refute
we ought to refute
you ought to refute
they ought to refute 	I ought to be refuting
you ought to be refuting
he ought to be refuting
we ought to be refuting
you ought to be refuting
they ought to be refuting	I ought to have refuted
you ought to have refuted
he ought to have refuted
we ought to have refuted
you ought to have refuted
they ought to have refuted	I ought to have been refuting
you ought to have been refuting
he ought to have been refuting
we ought to have been refuting
you ought to have been refuting
they ought to have been refuting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to refute
you oughtn't to refute
he oughtn't to refute
we oughtn't to refute
you oughtn't to refute
they oughtn't to refute 	I oughtn't to be refuting
you oughtn't to be refuting
he oughtn't to be refuting
we oughtn't to be refuting
you oughtn't to be refuting
they oughtn't to be refuting	I oughtn't to have refuted
you oughtn't to have refuted
he oughtn't to have refuted
we oughtn't to have refuted
you oughtn't to have refuted
they oughtn't to have refuted	I oughtn't to have been refuting
you oughtn't to have been refuting
he oughtn't to have been refuting
we oughtn't to have been refuting
you oughtn't to have been refuting
they oughtn't to have been refuting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I refute?
ought to you refute?
ought to he refute?
ought to we refute?
ought to you refute?
ought to they refute? 	ought to I be refuting?
ought to you be refuting?
ought to he be refuting?
ought to we be refuting?
ought to you be refuting?
ought to they be refuting? 	ought to I have refuted?
ought to you have refuted?
ought to he have refuted?
ought to we have refuted?
ought to you have refuted?
ought to they have refuted? 	ought to I have been refuting?
ought to you have been refuting?
ought to he have been refuting?
ought to we have been refuting?
ought to you have been refuting?
ought to they have been refuting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to refute?
oughtn't you to refute?
oughtn't he to refute?
oughtn't we to refute?
oughtn't you to refute?
oughtn't they to refute? 	oughtn't I to be refuting?
oughtn't you to be refuting?
oughtn't he to be refuting?
oughtn't we to be refuting?
oughtn't you to be refuting?
oughtn't they to be refuting? 	oughtn't I to have refuted?
oughtn't you to have refuted?
oughtn't he to have refuted?
oughtn't we to have refuted?
oughtn't you to have refuted?
oughtn't they to have refuted? 	oughtn't I to have been refuting?
oughtn't you to have been refuting?
oughtn't he to have been refuting?
oughtn't we to have been refuting?
oughtn't you to have been refuting?
oughtn't they to have been refuting?