ought to certify
Regular verb: certify - certified- certified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to certify
you ought to certify
he ought to certify
we ought to certify
you ought to certify
they ought to certify 	I ought to be certifying
you ought to be certifying
he ought to be certifying
we ought to be certifying
you ought to be certifying
they ought to be certifying	I ought to have certified
you ought to have certified
he ought to have certified
we ought to have certified
you ought to have certified
they ought to have certified	I ought to have been certifying
you ought to have been certifying
he ought to have been certifying
we ought to have been certifying
you ought to have been certifying
they ought to have been certifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to certify
you oughtn't to certify
he oughtn't to certify
we oughtn't to certify
you oughtn't to certify
they oughtn't to certify 	I oughtn't to be certifying
you oughtn't to be certifying
he oughtn't to be certifying
we oughtn't to be certifying
you oughtn't to be certifying
they oughtn't to be certifying	I oughtn't to have certified
you oughtn't to have certified
he oughtn't to have certified
we oughtn't to have certified
you oughtn't to have certified
they oughtn't to have certified	I oughtn't to have been certifying
you oughtn't to have been certifying
he oughtn't to have been certifying
we oughtn't to have been certifying
you oughtn't to have been certifying
they oughtn't to have been certifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I certify?
ought to you certify?
ought to he certify?
ought to we certify?
ought to you certify?
ought to they certify? 	ought to I be certifying?
ought to you be certifying?
ought to he be certifying?
ought to we be certifying?
ought to you be certifying?
ought to they be certifying? 	ought to I have certified?
ought to you have certified?
ought to he have certified?
ought to we have certified?
ought to you have certified?
ought to they have certified? 	ought to I have been certifying?
ought to you have been certifying?
ought to he have been certifying?
ought to we have been certifying?
ought to you have been certifying?
ought to they have been certifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to certify?
oughtn't you to certify?
oughtn't he to certify?
oughtn't we to certify?
oughtn't you to certify?
oughtn't they to certify? 	oughtn't I to be certifying?
oughtn't you to be certifying?
oughtn't he to be certifying?
oughtn't we to be certifying?
oughtn't you to be certifying?
oughtn't they to be certifying? 	oughtn't I to have certified?
oughtn't you to have certified?
oughtn't he to have certified?
oughtn't we to have certified?
oughtn't you to have certified?
oughtn't they to have certified? 	oughtn't I to have been certifying?
oughtn't you to have been certifying?
oughtn't he to have been certifying?
oughtn't we to have been certifying?
oughtn't you to have been certifying?
oughtn't they to have been certifying?