English verb conjugation
SHOULD HARKEN

Regular verb: harken - harkened - harkened

Affirmation

Simple form	V-ing form
I'd harken you'd harken he'd harken we'd harken you'd harken they'd harken	I'd be harkening you'd be harkening he'd be harkening we'd be harkening you'd be harkening they'd be harkening
Perfect	V-ing perfect
I should've harkened you should've harkened he should've harkened we should've harkened you should've harkened they should've harkened	I should've been harkening you should've been harkening he should've been harkening we should've been harkening you should've been harkening they should've been harkening

Negation

Simple form	V-ing form
I shouldn't harken you shouldn't harken he shouldn't harken we shouldn't harken you shouldn't harken they shouldn't harken	I shouldn't be harkening you shouldn't be harkening he shouldn't be harkening we shouldn't be harkening you shouldn't be harkening they shouldn't be harkening
Perfect	V-ing perfect
I shouldn't have harkened you shouldn't have harkened he shouldn't have harkened we shouldn't have harkened you shouldn't have harkened they shouldn't have harkened	I shouldn't have been harkening you shouldn't have been harkening he shouldn't have been harkening we shouldn't have been harkening you shouldn't have been harkening they shouldn't have been harkening

Interrogative form

Simple form	V-ing form
should I harken? should you harken? should he harken? should we harken? should you harken? should they harken?	should I be harkening? should you be harkening? should he be harkening? should we be harkening? should you be harkening? should they be harkening?
Perfect	V-ing perfect
should I have harkened? should you have harkened? should he have harkened? should we have harkened? should you have harkened? should they have harkened?	should I have been harkening? should you have been harkening? should he have been harkening? should we have been harkening? should you have been harkening? should they have been harkening?

Interro-negative form

Simple form	V-ing form
shouldn't I harken? shouldn't you harken? shouldn't he harken? shouldn't we harken? shouldn't you harken? shouldn't they harken?	shouldn't I be harkening? shouldn't you be harkening? shouldn't he be harkening? shouldn't we be harkening? shouldn't you be harkening? shouldn't they be harkening?
Perfect	V-ing perfect
shouldn't I have harkened? shouldn't you have harkened? shouldn't he have harkened? shouldn't we have harkened? shouldn't you have harkened? shouldn't they have harkened?	shouldn't I have been harkening? shouldn't you have been harkening? shouldn't he have been harkening? shouldn't we have been harkening? shouldn't you have been harkening? shouldn't they have been harkening?