ought to certificate
Regular verb: certificate - certificated- certificated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to certificate
you ought to certificate
he ought to certificate
we ought to certificate
you ought to certificate
they ought to certificate 	I ought to be certificating
you ought to be certificating
he ought to be certificating
we ought to be certificating
you ought to be certificating
they ought to be certificating	I ought to have certificated
you ought to have certificated
he ought to have certificated
we ought to have certificated
you ought to have certificated
they ought to have certificated	I ought to have been certificating
you ought to have been certificating
he ought to have been certificating
we ought to have been certificating
you ought to have been certificating
they ought to have been certificating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to certificate
you oughtn't to certificate
he oughtn't to certificate
we oughtn't to certificate
you oughtn't to certificate
they oughtn't to certificate 	I oughtn't to be certificating
you oughtn't to be certificating
he oughtn't to be certificating
we oughtn't to be certificating
you oughtn't to be certificating
they oughtn't to be certificating	I oughtn't to have certificated
you oughtn't to have certificated
he oughtn't to have certificated
we oughtn't to have certificated
you oughtn't to have certificated
they oughtn't to have certificated	I oughtn't to have been certificating
you oughtn't to have been certificating
he oughtn't to have been certificating
we oughtn't to have been certificating
you oughtn't to have been certificating
they oughtn't to have been certificating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I certificate?
ought to you certificate?
ought to he certificate?
ought to we certificate?
ought to you certificate?
ought to they certificate? 	ought to I be certificating?
ought to you be certificating?
ought to he be certificating?
ought to we be certificating?
ought to you be certificating?
ought to they be certificating? 	ought to I have certificated?
ought to you have certificated?
ought to he have certificated?
ought to we have certificated?
ought to you have certificated?
ought to they have certificated? 	ought to I have been certificating?
ought to you have been certificating?
ought to he have been certificating?
ought to we have been certificating?
ought to you have been certificating?
ought to they have been certificating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to certificate?
oughtn't you to certificate?
oughtn't he to certificate?
oughtn't we to certificate?
oughtn't you to certificate?
oughtn't they to certificate? 	oughtn't I to be certificating?
oughtn't you to be certificating?
oughtn't he to be certificating?
oughtn't we to be certificating?
oughtn't you to be certificating?
oughtn't they to be certificating? 	oughtn't I to have certificated?
oughtn't you to have certificated?
oughtn't he to have certificated?
oughtn't we to have certificated?
oughtn't you to have certificated?
oughtn't they to have certificated? 	oughtn't I to have been certificating?
oughtn't you to have been certificating?
oughtn't he to have been certificating?
oughtn't we to have been certificating?
oughtn't you to have been certificating?
oughtn't they to have been certificating?