I must lessen you must lessen she must lessen we must lessen you must lessen they must lessen
Forme en V-ing
I must be lessening you must be lessening she must be lessening we must be lessening you must be lessening they must be lessening
Perfect
I must have lessened you must have lessened she must have lessened we must have lessened you must have lessened they must have lessened
Perfect en V-ing
I must have been lessening you must have been lessening she must have been lessening we must have been lessening you must have been lessening they must have been lessening
Négation
Forme simple
I mustn't lessen you mustn't lessen she mustn't lessen we mustn't lessen you mustn't lessen they mustn't lessen
Forme en V-ing
I mustn't be lessening you mustn't be lessening she mustn't be lessening we mustn't be lessening you mustn't be lessening they mustn't be lessening
Perfect
I mustn't have lessened you mustn't have lessened she mustn't have lessened we mustn't have lessened you mustn't have lessened they mustn't have lessened
Perfect en V-ing
I mustn't have been lessening you mustn't have been lessening she mustn't have been lessening we mustn't have been lessening you mustn't have been lessening they mustn't have been lessening
Forme interrogative
Forme simple
must I lessen? must you lessen? must she lessen? must we lessen? must you lessen? must they lessen?
Forme en V-ing
must I be lessening? must you be lessening? must she be lessening? must we be lessening? must you be lessening? must they be lessening?
Perfect
must I have lessened? must you have lessened? must she have lessened? must we have lessened? must you have lessened? must they have lessened?
Perfect en V-ing
must I have been lessening? must you have been lessening? must she have been lessening? must we have been lessening? must you have been lessening? must they have been lessening?
Forme interro-négative
Forme simple
mustn't I lessen? mustn't you lessen? mustn't she lessen? mustn't we lessen? mustn't you lessen? mustn't they lessen?
Forme en V-ing
mustn't I be lessening? mustn't you be lessening? mustn't she be lessening? mustn't we be lessening? mustn't you be lessening? mustn't they be lessening?
Perfect
mustn't I have lessened? mustn't you have lessened? mustn't she have lessened? mustn't we have lessened? mustn't you have lessened? mustn't they have lessened?
Perfect en V-ing
mustn't I have been lessening? mustn't you have been lessening? mustn't she have been lessening? mustn't we have been lessening? mustn't you have been lessening? mustn't they have been lessening?