ought to knuckle
Regular verb: knuckle - knuckled- knuckled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to knuckle
you ought to knuckle
he ought to knuckle
we ought to knuckle
you ought to knuckle
they ought to knuckle 	I ought to be knuckling
you ought to be knuckling
he ought to be knuckling
we ought to be knuckling
you ought to be knuckling
they ought to be knuckling	I ought to have knuckled
you ought to have knuckled
he ought to have knuckled
we ought to have knuckled
you ought to have knuckled
they ought to have knuckled	I ought to have been knuckling
you ought to have been knuckling
he ought to have been knuckling
we ought to have been knuckling
you ought to have been knuckling
they ought to have been knuckling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to knuckle
you oughtn't to knuckle
he oughtn't to knuckle
we oughtn't to knuckle
you oughtn't to knuckle
they oughtn't to knuckle 	I oughtn't to be knuckling
you oughtn't to be knuckling
he oughtn't to be knuckling
we oughtn't to be knuckling
you oughtn't to be knuckling
they oughtn't to be knuckling	I oughtn't to have knuckled
you oughtn't to have knuckled
he oughtn't to have knuckled
we oughtn't to have knuckled
you oughtn't to have knuckled
they oughtn't to have knuckled	I oughtn't to have been knuckling
you oughtn't to have been knuckling
he oughtn't to have been knuckling
we oughtn't to have been knuckling
you oughtn't to have been knuckling
they oughtn't to have been knuckling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I knuckle?
ought to you knuckle?
ought to he knuckle?
ought to we knuckle?
ought to you knuckle?
ought to they knuckle? 	ought to I be knuckling?
ought to you be knuckling?
ought to he be knuckling?
ought to we be knuckling?
ought to you be knuckling?
ought to they be knuckling? 	ought to I have knuckled?
ought to you have knuckled?
ought to he have knuckled?
ought to we have knuckled?
ought to you have knuckled?
ought to they have knuckled? 	ought to I have been knuckling?
ought to you have been knuckling?
ought to he have been knuckling?
ought to we have been knuckling?
ought to you have been knuckling?
ought to they have been knuckling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to knuckle?
oughtn't you to knuckle?
oughtn't he to knuckle?
oughtn't we to knuckle?
oughtn't you to knuckle?
oughtn't they to knuckle? 	oughtn't I to be knuckling?
oughtn't you to be knuckling?
oughtn't he to be knuckling?
oughtn't we to be knuckling?
oughtn't you to be knuckling?
oughtn't they to be knuckling? 	oughtn't I to have knuckled?
oughtn't you to have knuckled?
oughtn't he to have knuckled?
oughtn't we to have knuckled?
oughtn't you to have knuckled?
oughtn't they to have knuckled? 	oughtn't I to have been knuckling?
oughtn't you to have been knuckling?
oughtn't he to have been knuckling?
oughtn't we to have been knuckling?
oughtn't you to have been knuckling?
oughtn't they to have been knuckling?