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 cannot lessen you cannot lessen he cannot lessen we cannot lessen you cannot lessen they cannot lessen	I cannot be lessening you cannot be lessening he cannot be lessening we cannot be lessening you cannot be lessening they cannot be lessening
Perfect	V-ing perfect
I cannot have lessened you cannot have lessened he cannot have lessened we cannot have lessened you cannot have lessened they cannot have lessened	I cannot have been lessening you cannot have been lessening he cannot have been lessening we cannot have been lessening you cannot have been lessening they cannot 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 I not lessen? can you not lessen? can he not lessen? can we not lessen? can you not lessen? can they not lessen?	can I not be lessening? can you not be lessening? can he not be lessening? can we not be lessening? can you not be lessening? can they not be lessening?
Perfect	V-ing perfect
can I not have lessened? can you not have lessened? can he not have lessened? can we not have lessened? can you not have lessened? can they not have lessened?	can I not have been lessening? can you not have been lessening? can he not have been lessening? can we not have been lessening? can you not have been lessening? can they not have been lessening?