ought to yawn
Regular verb: yawn - yawned- yawned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to yawn
you ought to yawn
he ought to yawn
we ought to yawn
you ought to yawn
they ought to yawn 	I ought to be yawning
you ought to be yawning
he ought to be yawning
we ought to be yawning
you ought to be yawning
they ought to be yawning	I ought to have yawned
you ought to have yawned
he ought to have yawned
we ought to have yawned
you ought to have yawned
they ought to have yawned	I ought to have been yawning
you ought to have been yawning
he ought to have been yawning
we ought to have been yawning
you ought to have been yawning
they ought to have been yawning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to yawn
you oughtn't to yawn
he oughtn't to yawn
we oughtn't to yawn
you oughtn't to yawn
they oughtn't to yawn 	I oughtn't to be yawning
you oughtn't to be yawning
he oughtn't to be yawning
we oughtn't to be yawning
you oughtn't to be yawning
they oughtn't to be yawning	I oughtn't to have yawned
you oughtn't to have yawned
he oughtn't to have yawned
we oughtn't to have yawned
you oughtn't to have yawned
they oughtn't to have yawned	I oughtn't to have been yawning
you oughtn't to have been yawning
he oughtn't to have been yawning
we oughtn't to have been yawning
you oughtn't to have been yawning
they oughtn't to have been yawning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I yawn?
ought to you yawn?
ought to he yawn?
ought to we yawn?
ought to you yawn?
ought to they yawn? 	ought to I be yawning?
ought to you be yawning?
ought to he be yawning?
ought to we be yawning?
ought to you be yawning?
ought to they be yawning? 	ought to I have yawned?
ought to you have yawned?
ought to he have yawned?
ought to we have yawned?
ought to you have yawned?
ought to they have yawned? 	ought to I have been yawning?
ought to you have been yawning?
ought to he have been yawning?
ought to we have been yawning?
ought to you have been yawning?
ought to they have been yawning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to yawn?
oughtn't you to yawn?
oughtn't he to yawn?
oughtn't we to yawn?
oughtn't you to yawn?
oughtn't they to yawn? 	oughtn't I to be yawning?
oughtn't you to be yawning?
oughtn't he to be yawning?
oughtn't we to be yawning?
oughtn't you to be yawning?
oughtn't they to be yawning? 	oughtn't I to have yawned?
oughtn't you to have yawned?
oughtn't he to have yawned?
oughtn't we to have yawned?
oughtn't you to have yawned?
oughtn't they to have yawned? 	oughtn't I to have been yawning?
oughtn't you to have been yawning?
oughtn't he to have been yawning?
oughtn't we to have been yawning?
oughtn't you to have been yawning?
oughtn't they to have been yawning?