I must lengthen you must lengthen he must lengthen we must lengthen you must lengthen they must lengthen
Forme en V-ing
I must be lengthening you must be lengthening he must be lengthening we must be lengthening you must be lengthening they must be lengthening
Perfect
I must have lengthened you must have lengthened he must have lengthened we must have lengthened you must have lengthened they must have lengthened
Perfect en V-ing
I must have been lengthening you must have been lengthening he must have been lengthening we must have been lengthening you must have been lengthening they must have been lengthening
Négation
Forme simple
I must not lengthen you must not lengthen he must not lengthen we must not lengthen you must not lengthen they must not lengthen
Forme en V-ing
I must not be lengthening you must not be lengthening he must not be lengthening we must not be lengthening you must not be lengthening they must not be lengthening
Perfect
I must not have lengthened you must not have lengthened he must not have lengthened we must not have lengthened you must not have lengthened they must not have lengthened
Perfect en V-ing
I must not have been lengthening you must not have been lengthening he must not have been lengthening we must not have been lengthening you must not have been lengthening they must not have been lengthening
Forme interrogative
Forme simple
must I lengthen? must you lengthen? must he lengthen? must we lengthen? must you lengthen? must they lengthen?
Forme en V-ing
must I be lengthening? must you be lengthening? must he be lengthening? must we be lengthening? must you be lengthening? must they be lengthening?
Perfect
must I have lengthened? must you have lengthened? must he have lengthened? must we have lengthened? must you have lengthened? must they have lengthened?
Perfect en V-ing
must I have been lengthening? must you have been lengthening? must he have been lengthening? must we have been lengthening? must you have been lengthening? must they have been lengthening?
Forme interro-négative
Forme simple
must I not lengthen? must you not lengthen? must he not lengthen? must we not lengthen? must you not lengthen? must they not lengthen?
Forme en V-ing
must I not be lengthening? must you not be lengthening? must he not be lengthening? must we not be lengthening? must you not be lengthening? must they not be lengthening?
Perfect
must I not have lengthened? must you not have lengthened? must he not have lengthened? must we not have lengthened? must you not have lengthened? must they not have lengthened?
Perfect en V-ing
must I not have been lengthening? must you not have been lengthening? must he not have been lengthening? must we not have been lengthening? must you not have been lengthening? must they not have been lengthening?