ought to ko
Regular verb: ko - koed- koed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to ko
you ought to ko
he ought to ko
we ought to ko
you ought to ko
they ought to ko 	I ought to be koing
you ought to be koing
he ought to be koing
we ought to be koing
you ought to be koing
they ought to be koing	I ought to have koed
you ought to have koed
he ought to have koed
we ought to have koed
you ought to have koed
they ought to have koed	I ought to have been koing
you ought to have been koing
he ought to have been koing
we ought to have been koing
you ought to have been koing
they ought to have been koing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to ko
you oughtn't to ko
he oughtn't to ko
we oughtn't to ko
you oughtn't to ko
they oughtn't to ko 	I oughtn't to be koing
you oughtn't to be koing
he oughtn't to be koing
we oughtn't to be koing
you oughtn't to be koing
they oughtn't to be koing	I oughtn't to have koed
you oughtn't to have koed
he oughtn't to have koed
we oughtn't to have koed
you oughtn't to have koed
they oughtn't to have koed	I oughtn't to have been koing
you oughtn't to have been koing
he oughtn't to have been koing
we oughtn't to have been koing
you oughtn't to have been koing
they oughtn't to have been koing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I ko?
ought to you ko?
ought to he ko?
ought to we ko?
ought to you ko?
ought to they ko? 	ought to I be koing?
ought to you be koing?
ought to he be koing?
ought to we be koing?
ought to you be koing?
ought to they be koing? 	ought to I have koed?
ought to you have koed?
ought to he have koed?
ought to we have koed?
ought to you have koed?
ought to they have koed? 	ought to I have been koing?
ought to you have been koing?
ought to he have been koing?
ought to we have been koing?
ought to you have been koing?
ought to they have been koing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to ko?
oughtn't you to ko?
oughtn't he to ko?
oughtn't we to ko?
oughtn't you to ko?
oughtn't they to ko? 	oughtn't I to be koing?
oughtn't you to be koing?
oughtn't he to be koing?
oughtn't we to be koing?
oughtn't you to be koing?
oughtn't they to be koing? 	oughtn't I to have koed?
oughtn't you to have koed?
oughtn't he to have koed?
oughtn't we to have koed?
oughtn't you to have koed?
oughtn't they to have koed? 	oughtn't I to have been koing?
oughtn't you to have been koing?
oughtn't he to have been koing?
oughtn't we to have been koing?
oughtn't you to have been koing?
oughtn't they to have been koing?