English verb conjugation
COULD LESSEN

Regular verb: lessen - lessened - lessened

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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