ought to letter
Regular verb: letter - lettered- lettered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to letter
you ought to letter
he ought to letter
we ought to letter
you ought to letter
they ought to letter 	I ought to be lettering
you ought to be lettering
he ought to be lettering
we ought to be lettering
you ought to be lettering
they ought to be lettering	I ought to have lettered
you ought to have lettered
he ought to have lettered
we ought to have lettered
you ought to have lettered
they ought to have lettered	I ought to have been lettering
you ought to have been lettering
he ought to have been lettering
we ought to have been lettering
you ought to have been lettering
they ought to have been lettering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to letter
you oughtn't to letter
he oughtn't to letter
we oughtn't to letter
you oughtn't to letter
they oughtn't to letter 	I oughtn't to be lettering
you oughtn't to be lettering
he oughtn't to be lettering
we oughtn't to be lettering
you oughtn't to be lettering
they oughtn't to be lettering	I oughtn't to have lettered
you oughtn't to have lettered
he oughtn't to have lettered
we oughtn't to have lettered
you oughtn't to have lettered
they oughtn't to have lettered	I oughtn't to have been lettering
you oughtn't to have been lettering
he oughtn't to have been lettering
we oughtn't to have been lettering
you oughtn't to have been lettering
they oughtn't to have been lettering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I letter?
ought to you letter?
ought to he letter?
ought to we letter?
ought to you letter?
ought to they letter? 	ought to I be lettering?
ought to you be lettering?
ought to he be lettering?
ought to we be lettering?
ought to you be lettering?
ought to they be lettering? 	ought to I have lettered?
ought to you have lettered?
ought to he have lettered?
ought to we have lettered?
ought to you have lettered?
ought to they have lettered? 	ought to I have been lettering?
ought to you have been lettering?
ought to he have been lettering?
ought to we have been lettering?
ought to you have been lettering?
ought to they have been lettering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to letter?
oughtn't you to letter?
oughtn't he to letter?
oughtn't we to letter?
oughtn't you to letter?
oughtn't they to letter? 	oughtn't I to be lettering?
oughtn't you to be lettering?
oughtn't he to be lettering?
oughtn't we to be lettering?
oughtn't you to be lettering?
oughtn't they to be lettering? 	oughtn't I to have lettered?
oughtn't you to have lettered?
oughtn't he to have lettered?
oughtn't we to have lettered?
oughtn't you to have lettered?
oughtn't they to have lettered? 	oughtn't I to have been lettering?
oughtn't you to have been lettering?
oughtn't he to have been lettering?
oughtn't we to have been lettering?
oughtn't you to have been lettering?
oughtn't they to have been lettering?