English verb conjugation
SHOULD DARKEN

Regular verb: darken - darkened - darkened

Affirmation

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

Negation

Simple form	V-ing form
I should not darken you should not darken he should not darken we should not darken you should not darken they should not darken	I should not be darkening you should not be darkening he should not be darkening we should not be darkening you should not be darkening they should not be darkening
Perfect	V-ing perfect
I should not have darkened you should not have darkened he should not have darkened we should not have darkened you should not have darkened they should not have darkened	I should not have been darkening you should not have been darkening he should not have been darkening we should not have been darkening you should not have been darkening they should not 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
should I not darken? should you not darken? should he not darken? should we not darken? should you not darken? should they not darken?	should I not be darkening? should you not be darkening? should he not be darkening? should we not be darkening? should you not be darkening? should they not be darkening?
Perfect	V-ing perfect
should I not have darkened? should you not have darkened? should he not have darkened? should we not have darkened? should you not have darkened? should they not have darkened?	should I not have been darkening? should you not have been darkening? should he not have been darkening? should we not have been darkening? should you not have been darkening? should they not have been darkening?