English verb conjugation
SHOULD SICKEN

Regular verb: sicken - sickened - sickened

Affirmation

Simple form	V-ing form
I should sicken you should sicken he should sicken we should sicken you should sicken they should sicken	I should be sickening you should be sickening he should be sickening we should be sickening you should be sickening they should be sickening
Perfect	V-ing perfect
I should have sickened you should have sickened he should have sickened we should have sickened you should have sickened they should have sickened	I should have been sickening you should have been sickening he should have been sickening we should have been sickening you should have been sickening they should have been sickening

Negation

Simple form	V-ing form
I should not sicken you should not sicken he should not sicken we should not sicken you should not sicken they should not sicken	I should not be sickening you should not be sickening he should not be sickening we should not be sickening you should not be sickening they should not be sickening
Perfect	V-ing perfect
I should not have sickened you should not have sickened he should not have sickened we should not have sickened you should not have sickened they should not have sickened	I should not have been sickening you should not have been sickening he should not have been sickening we should not have been sickening you should not have been sickening they should not have been sickening

Interrogative form

Simple form	V-ing form
should I sicken? should you sicken? should he sicken? should we sicken? should you sicken? should they sicken?	should I be sickening? should you be sickening? should he be sickening? should we be sickening? should you be sickening? should they be sickening?
Perfect	V-ing perfect
should I have sickened? should you have sickened? should he have sickened? should we have sickened? should you have sickened? should they have sickened?	should I have been sickening? should you have been sickening? should he have been sickening? should we have been sickening? should you have been sickening? should they have been sickening?

Interro-negative form

Simple form	V-ing form
should I not sicken? should you not sicken? should he not sicken? should we not sicken? should you not sicken? should they not sicken?	should I not be sickening? should you not be sickening? should he not be sickening? should we not be sickening? should you not be sickening? should they not be sickening?
Perfect	V-ing perfect
should I not have sickened? should you not have sickened? should he not have sickened? should we not have sickened? should you not have sickened? should they not have sickened?	should I not have been sickening? should you not have been sickening? should he not have been sickening? should we not have been sickening? should you not have been sickening? should they not have been sickening?