I must discern you must discern she must discern we must discern you must discern they must discern
Forme en V-ing
I must be discerning you must be discerning she must be discerning we must be discerning you must be discerning they must be discerning
Perfect
I must have discerned you must have discerned she must have discerned we must have discerned you must have discerned they must have discerned
Perfect en V-ing
I must have been discerning you must have been discerning she must have been discerning we must have been discerning you must have been discerning they must have been discerning
Négation
Forme simple
I must not discern you must not discern she must not discern we must not discern you must not discern they must not discern
Forme en V-ing
I must not be discerning you must not be discerning she must not be discerning we must not be discerning you must not be discerning they must not be discerning
Perfect
I must not have discerned you must not have discerned she must not have discerned we must not have discerned you must not have discerned they must not have discerned
Perfect en V-ing
I must not have been discerning you must not have been discerning she must not have been discerning we must not have been discerning you must not have been discerning they must not have been discerning
Forme interrogative
Forme simple
must I discern? must you discern? must she discern? must we discern? must you discern? must they discern?
Forme en V-ing
must I be discerning? must you be discerning? must she be discerning? must we be discerning? must you be discerning? must they be discerning?
Perfect
must I have discerned? must you have discerned? must she have discerned? must we have discerned? must you have discerned? must they have discerned?
Perfect en V-ing
must I have been discerning? must you have been discerning? must she have been discerning? must we have been discerning? must you have been discerning? must they have been discerning?
Forme interro-négative
Forme simple
must I not discern? must you not discern? must she not discern? must we not discern? must you not discern? must they not discern?
Forme en V-ing
must I not be discerning? must you not be discerning? must she not be discerning? must we not be discerning? must you not be discerning? must they not be discerning?
Perfect
must I not have discerned? must you not have discerned? must she not have discerned? must we not have discerned? must you not have discerned? must they not have discerned?
Perfect en V-ing
must I not have been discerning? must you not have been discerning? must she not have been discerning? must we not have been discerning? must you not have been discerning? must they not have been discerning?