I must counter you must counter she must counter we must counter you must counter they must counter
Forme en V-ing
I must be countering you must be countering she must be countering we must be countering you must be countering they must be countering
Perfect
I must have countered you must have countered she must have countered we must have countered you must have countered they must have countered
Perfect en V-ing
I must have been countering you must have been countering she must have been countering we must have been countering you must have been countering they must have been countering
Négation
Forme simple
I must not counter you must not counter she must not counter we must not counter you must not counter they must not counter
Forme en V-ing
I must not be countering you must not be countering she must not be countering we must not be countering you must not be countering they must not be countering
Perfect
I must not have countered you must not have countered she must not have countered we must not have countered you must not have countered they must not have countered
Perfect en V-ing
I must not have been countering you must not have been countering she must not have been countering we must not have been countering you must not have been countering they must not have been countering
Forme interrogative
Forme simple
must I counter? must you counter? must she counter? must we counter? must you counter? must they counter?
Forme en V-ing
must I be countering? must you be countering? must she be countering? must we be countering? must you be countering? must they be countering?
Perfect
must I have countered? must you have countered? must she have countered? must we have countered? must you have countered? must they have countered?
Perfect en V-ing
must I have been countering? must you have been countering? must she have been countering? must we have been countering? must you have been countering? must they have been countering?
Forme interro-négative
Forme simple
must I not counter? must you not counter? must she not counter? must we not counter? must you not counter? must they not counter?
Forme en V-ing
must I not be countering? must you not be countering? must she not be countering? must we not be countering? must you not be countering? must they not be countering?
Perfect
must I not have countered? must you not have countered? must she not have countered? must we not have countered? must you not have countered? must they not have countered?
Perfect en V-ing
must I not have been countering? must you not have been countering? must she not have been countering? must we not have been countering? must you not have been countering? must they not have been countering?