English verb conjugation
SHOULD SLACKEN

Regular verb: slacken - slackened - slackened

Affirmation

Simple form	V-ing form
I should slacken you should slacken he should slacken we should slacken you should slacken they should slacken	I should be slackening you should be slackening he should be slackening we should be slackening you should be slackening they should be slackening
Perfect	V-ing perfect
I should have slackened you should have slackened he should have slackened we should have slackened you should have slackened they should have slackened	I should have been slackening you should have been slackening he should have been slackening we should have been slackening you should have been slackening they should have been slackening

Negation

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

Interrogative form

Simple form	V-ing form
should I slacken? should you slacken? should he slacken? should we slacken? should you slacken? should they slacken?	should I be slackening? should you be slackening? should he be slackening? should we be slackening? should you be slackening? should they be slackening?
Perfect	V-ing perfect
should I have slackened? should you have slackened? should he have slackened? should we have slackened? should you have slackened? should they have slackened?	should I have been slackening? should you have been slackening? should he have been slackening? should we have been slackening? should you have been slackening? should they have been slackening?

Interro-negative form

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