ought to kern
Regular verb: kern - kerned- kerned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to kern
you ought to kern
he ought to kern
we ought to kern
you ought to kern
they ought to kern 	I ought to be kerning
you ought to be kerning
he ought to be kerning
we ought to be kerning
you ought to be kerning
they ought to be kerning	I ought to have kerned
you ought to have kerned
he ought to have kerned
we ought to have kerned
you ought to have kerned
they ought to have kerned	I ought to have been kerning
you ought to have been kerning
he ought to have been kerning
we ought to have been kerning
you ought to have been kerning
they ought to have been kerning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to kern
you oughtn't to kern
he oughtn't to kern
we oughtn't to kern
you oughtn't to kern
they oughtn't to kern 	I oughtn't to be kerning
you oughtn't to be kerning
he oughtn't to be kerning
we oughtn't to be kerning
you oughtn't to be kerning
they oughtn't to be kerning	I oughtn't to have kerned
you oughtn't to have kerned
he oughtn't to have kerned
we oughtn't to have kerned
you oughtn't to have kerned
they oughtn't to have kerned	I oughtn't to have been kerning
you oughtn't to have been kerning
he oughtn't to have been kerning
we oughtn't to have been kerning
you oughtn't to have been kerning
they oughtn't to have been kerning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I kern?
ought to you kern?
ought to he kern?
ought to we kern?
ought to you kern?
ought to they kern? 	ought to I be kerning?
ought to you be kerning?
ought to he be kerning?
ought to we be kerning?
ought to you be kerning?
ought to they be kerning? 	ought to I have kerned?
ought to you have kerned?
ought to he have kerned?
ought to we have kerned?
ought to you have kerned?
ought to they have kerned? 	ought to I have been kerning?
ought to you have been kerning?
ought to he have been kerning?
ought to we have been kerning?
ought to you have been kerning?
ought to they have been kerning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to kern?
oughtn't you to kern?
oughtn't he to kern?
oughtn't we to kern?
oughtn't you to kern?
oughtn't they to kern? 	oughtn't I to be kerning?
oughtn't you to be kerning?
oughtn't he to be kerning?
oughtn't we to be kerning?
oughtn't you to be kerning?
oughtn't they to be kerning? 	oughtn't I to have kerned?
oughtn't you to have kerned?
oughtn't he to have kerned?
oughtn't we to have kerned?
oughtn't you to have kerned?
oughtn't they to have kerned? 	oughtn't I to have been kerning?
oughtn't you to have been kerning?
oughtn't he to have been kerning?
oughtn't we to have been kerning?
oughtn't you to have been kerning?
oughtn't they to have been kerning?