Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I must fail fail you must fail fail he must fail fail we must fail fail you must fail fail they must fail fail
Forme en V-ing
I must be fail failing you must be fail failing he must be fail failing we must be fail failing you must be fail failing they must be fail failing
Perfect
I must have fail failed you must have fail failed he must have fail failed we must have fail failed you must have fail failed they must have fail failed
Perfect en V-ing
I must have been fail failing you must have been fail failing he must have been fail failing we must have been fail failing you must have been fail failing they must have been fail failing
Négation
Forme simple
I must not fail fail you must not fail fail he must not fail fail we must not fail fail you must not fail fail they must not fail fail
Forme en V-ing
I must not be fail failing you must not be fail failing he must not be fail failing we must not be fail failing you must not be fail failing they must not be fail failing
Perfect
I must not have fail failed you must not have fail failed he must not have fail failed we must not have fail failed you must not have fail failed they must not have fail failed
Perfect en V-ing
I must not have been fail failing you must not have been fail failing he must not have been fail failing we must not have been fail failing you must not have been fail failing they must not have been fail failing
Forme interrogative
Forme simple
must I fail fail? must you fail fail? must he fail fail? must we fail fail? must you fail fail? must they fail fail?
Forme en V-ing
must I be fail failing? must you be fail failing? must he be fail failing? must we be fail failing? must you be fail failing? must they be fail failing?
Perfect
must I have fail failed? must you have fail failed? must he have fail failed? must we have fail failed? must you have fail failed? must they have fail failed?
Perfect en V-ing
must I have been fail failing? must you have been fail failing? must he have been fail failing? must we have been fail failing? must you have been fail failing? must they have been fail failing?
Forme interro-négative
Forme simple
must I not fail fail? must you not fail fail? must he not fail fail? must we not fail fail? must you not fail fail? must they not fail fail?
Forme en V-ing
must I not be fail failing? must you not be fail failing? must he not be fail failing? must we not be fail failing? must you not be fail failing? must they not be fail failing?
Perfect
must I not have fail failed? must you not have fail failed? must he not have fail failed? must we not have fail failed? must you not have fail failed? must they not have fail failed?
Perfect en V-ing
must I not have been fail failing? must you not have been fail failing? must he not have been fail failing? must we not have been fail failing? must you not have been fail failing? must they not have been fail failing?