English verb conjugation
SHOULD DARKEN

Regular verb: darken - darkened - darkened

Affirmation

Simple form	V-ing form
I'd darken you'd darken he'd darken we'd darken you'd darken they'd darken	I'd be darkening you'd be darkening he'd be darkening we'd be darkening you'd be darkening they'd be darkening
Perfect	V-ing perfect
I should've darkened you should've darkened he should've darkened we should've darkened you should've darkened they should've darkened	I should've been darkening you should've been darkening he should've been darkening we should've been darkening you should've been darkening they should've been darkening

Negation

Simple form	V-ing form
I shouldn't darken you shouldn't darken he shouldn't darken we shouldn't darken you shouldn't darken they shouldn't darken	I shouldn't be darkening you shouldn't be darkening he shouldn't be darkening we shouldn't be darkening you shouldn't be darkening they shouldn't be darkening
Perfect	V-ing perfect
I shouldn't have darkened you shouldn't have darkened he shouldn't have darkened we shouldn't have darkened you shouldn't have darkened they shouldn't have darkened	I shouldn't have been darkening you shouldn't have been darkening he shouldn't have been darkening we shouldn't have been darkening you shouldn't have been darkening they shouldn't have been darkening

Interrogative form

Simple form	V-ing form
should I darken? should you darken? should he darken? should we darken? should you darken? should they darken?	should I be darkening? should you be darkening? should he be darkening? should we be darkening? should you be darkening? should they be darkening?
Perfect	V-ing perfect
should I have darkened? should you have darkened? should he have darkened? should we have darkened? should you have darkened? should they have darkened?	should I have been darkening? should you have been darkening? should he have been darkening? should we have been darkening? should you have been darkening? should they have been darkening?

Interro-negative form

Simple form	V-ing form
shouldn't I darken? shouldn't you darken? shouldn't he darken? shouldn't we darken? shouldn't you darken? shouldn't they darken?	shouldn't I be darkening? shouldn't you be darkening? shouldn't he be darkening? shouldn't we be darkening? shouldn't you be darkening? shouldn't they be darkening?
Perfect	V-ing perfect
shouldn't I have darkened? shouldn't you have darkened? shouldn't he have darkened? shouldn't we have darkened? shouldn't you have darkened? shouldn't they have darkened?	shouldn't I have been darkening? shouldn't you have been darkening? shouldn't he have been darkening? shouldn't we have been darkening? shouldn't you have been darkening? shouldn't they have been darkening?