English verb conjugation
CAN LESSEN

Regular verb: lessen - lessened - lessened

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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