English verb conjugation
OUGHT TO LETTER

Regular verb: letter - lettered - lettered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?