English verb conjugation
MUST LESSEN

Regular verb: lessen - lessened - lessened

Affirmation

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

Negation

Simple form	V-ing form
I must not lessen you must not lessen he must not lessen we must not lessen you must not lessen they must not lessen	I must not be lessening you must not be lessening he must not be lessening we must not be lessening you must not be lessening they must not be lessening
Perfect	V-ing perfect
I must not have lessened you must not have lessened he must not have lessened we must not have lessened you must not have lessened they must not have lessened	I must not have been lessening you must not have been lessening he must not have been lessening we must not have been lessening you must not have been lessening they must not have been lessening

Interrogative form

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

Interro-negative form

Simple form	V-ing form
must I not lessen? must you not lessen? must he not lessen? must we not lessen? must you not lessen? must they not lessen?	must I not be lessening? must you not be lessening? must he not be lessening? must we not be lessening? must you not be lessening? must they not be lessening?
Perfect	V-ing perfect
must I not have lessened? must you not have lessened? must he not have lessened? must we not have lessened? must you not have lessened? must they not have lessened?	must I not have been lessening? must you not have been lessening? must he not have been lessening? must we not have been lessening? must you not have been lessening? must they not have been lessening?