English verb conjugation
SHOULD LESSEN

Regular verb: lessen - lessened - lessened

Affirmation

Simple form	V-ing form
I'd lessen you'd lessen he'd lessen we'd lessen you'd lessen they'd lessen	I'd be lessening you'd be lessening he'd be lessening we'd be lessening you'd be lessening they'd be lessening
Perfect	V-ing perfect
I should've lessened you should've lessened he should've lessened we should've lessened you should've lessened they should've lessened	I should've been lessening you should've been lessening he should've been lessening we should've been lessening you should've been lessening they should've been lessening

Negation

Simple form	V-ing form
I shouldn't lessen you shouldn't lessen he shouldn't lessen we shouldn't lessen you shouldn't lessen they shouldn't lessen	I shouldn't be lessening you shouldn't be lessening he shouldn't be lessening we shouldn't be lessening you shouldn't be lessening they shouldn't be lessening
Perfect	V-ing perfect
I shouldn't have lessened you shouldn't have lessened he shouldn't have lessened we shouldn't have lessened you shouldn't have lessened they shouldn't have lessened	I shouldn't have been lessening you shouldn't have been lessening he shouldn't have been lessening we shouldn't have been lessening you shouldn't have been lessening they shouldn't have been lessening

Interrogative form

Simple form	V-ing form
should I lessen? should you lessen? should he lessen? should we lessen? should you lessen? should they lessen?	should I be lessening? should you be lessening? should he be lessening? should we be lessening? should you be lessening? should they be lessening?
Perfect	V-ing perfect
should I have lessened? should you have lessened? should he have lessened? should we have lessened? should you have lessened? should they have lessened?	should I have been lessening? should you have been lessening? should he have been lessening? should we have been lessening? should you have been lessening? should they have been lessening?

Interro-negative form

Simple form	V-ing form
shouldn't I lessen? shouldn't you lessen? shouldn't he lessen? shouldn't we lessen? shouldn't you lessen? shouldn't they lessen?	shouldn't I be lessening? shouldn't you be lessening? shouldn't he be lessening? shouldn't we be lessening? shouldn't you be lessening? shouldn't they be lessening?
Perfect	V-ing perfect
shouldn't I have lessened? shouldn't you have lessened? shouldn't he have lessened? shouldn't we have lessened? shouldn't you have lessened? shouldn't they have lessened?	shouldn't I have been lessening? shouldn't you have been lessening? shouldn't he have been lessening? shouldn't we have been lessening? shouldn't you have been lessening? shouldn't they have been lessening?