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 he 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 he 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 he 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 he 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 ought not to slacken you ought not to slacken he ought not to slacken we ought not to slacken you ought not to slacken they ought not to slacken	I ought not to slackening you ought not to slackening he ought not to slackening we ought not to slackening you ought not to slackening they ought not to slackening
Perfect	V-ing perfect
I ought not to have slackened you ought not to have slackened he ought not to have slackened we ought not to have slackened you ought not to have slackened they ought not to have slackened	I ought not to have been slackening you ought not to have been slackening he ought not to have been slackening we ought not to have been slackening you ought not to have been slackening they ought not to have been slackening

Interrogative form

Simple form	V-ing form
ought to I slacken? ought to you slacken? ought to he 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 he 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 he 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 he 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
ought I not to slacken? ought you not to slacken? ought he not to slacken? ought we not to slacken? ought you not to slacken? ought they not to slacken?	ought I not to be slackening? ought you not to be slackening? ought he not to be slackening? ought we not to be slackening? ought you not to be slackening? ought they not to be slackening?
Perfect	V-ing perfect
ought I not to have slackened? ought you not to have slackened? ought he not to have slackened? ought we not to have slackened? ought you not to have slackened? ought they not to have slackened?	ought I not to have been slackening? ought you not to have been slackening? ought he not to have been slackening? ought we not to have been slackening? ought you not to have been slackening? ought they not to have been slackening?