English verb conjugation
OUGHT TO SLACKEN

Regular verb: slacken - slackened - slackened

Affirmation

Simple form	V-ing form
I ought to slacken you ought to slacken she ought to slacken we ought to slacken you ought to slacken they ought to slacken	I ought to be slackening you ought to be slackening she ought to be slackening we ought to be slackening you ought to be slackening they ought to be slackening
Perfect	V-ing perfect
I ought to have slackened you ought to have slackened she ought to have slackened we ought to have slackened you ought to have slackened they ought to have slackened	I ought to have been slackening you ought to have been slackening she ought to have been slackening we ought to have been slackening you ought to have been slackening they ought to have been slackening

Negation

Simple form	V-ing form
I oughtn't to slacken you oughtn't to slacken she oughtn't to slacken we oughtn't to slacken you oughtn't to slacken they oughtn't to slacken	I oughtn't to be slackening you oughtn't to be slackening she oughtn't to be slackening we oughtn't to be slackening you oughtn't to be slackening they oughtn't to be slackening
Perfect	V-ing perfect
I oughtn't to have slackened you oughtn't to have slackened she oughtn't to have slackened we oughtn't to have slackened you oughtn't to have slackened they oughtn't to have slackened	I oughtn't to have been slackening you oughtn't to have been slackening she oughtn't to have been slackening we oughtn't to have been slackening you oughtn't to have been slackening they oughtn't to have been slackening

Interrogative form

Simple form	V-ing form
ought to I slacken? ought to you slacken? ought to she slacken? ought to we slacken? ought to you slacken? ought to they slacken?	ought to I be slackening? ought to you be slackening? ought to she be slackening? ought to we be slackening? ought to you be slackening? ought to they be slackening?
Perfect	V-ing perfect
ought to I have slackened? ought to you have slackened? ought to she have slackened? ought to we have slackened? ought to you have slackened? ought to they have slackened?	ought to I have been slackening? ought to you have been slackening? ought to she have been slackening? ought to we have been slackening? ought to you have been slackening? ought to they have been slackening?

Interro-negative form

Simple form	V-ing form
oughtn't I to slacken? oughtn't you to slacken? oughtn't she to slacken? oughtn't we to slacken? oughtn't you to slacken? oughtn't they to slacken?	oughtn't I to be slackening? oughtn't you to be slackening? oughtn't she to be slackening? oughtn't we to be slackening? oughtn't you to be slackening? oughtn't they to be slackening?
Perfect	V-ing perfect
oughtn't I to have slackened? oughtn't you to have slackened? oughtn't she to have slackened? oughtn't we to have slackened? oughtn't you to have slackened? oughtn't they to have slackened?	oughtn't I to have been slackening? oughtn't you to have been slackening? oughtn't she to have been slackening? oughtn't we to have been slackening? oughtn't you to have been slackening? oughtn't they to have been slackening?