I must falter you must falter she must falter we must falter you must falter they must falter
Forma com V-ing
I must be faltering you must be faltering she must be faltering we must be faltering you must be faltering they must be faltering
Perfeito
I must have faltered you must have faltered she must have faltered we must have faltered you must have faltered they must have faltered
Perfeito com V-ing
I must have been faltering you must have been faltering she must have been faltering we must have been faltering you must have been faltering they must have been faltering
Negação
Forma simple
I must not falter you must not falter she must not falter we must not falter you must not falter they must not falter
Forma com V-ing
I must not be faltering you must not be faltering she must not be faltering we must not be faltering you must not be faltering they must not be faltering
Perfeito
I must not have faltered you must not have faltered she must not have faltered we must not have faltered you must not have faltered they must not have faltered
Perfeito com V-ing
I must not have been faltering you must not have been faltering she must not have been faltering we must not have been faltering you must not have been faltering they must not have been faltering
Forma interrogativa
Forma simple
must I falter? must you falter? must she falter? must we falter? must you falter? must they falter?
Forma com V-ing
must I be faltering? must you be faltering? must she be faltering? must we be faltering? must you be faltering? must they be faltering?
Perfeito
must I have faltered? must you have faltered? must she have faltered? must we have faltered? must you have faltered? must they have faltered?
Perfeito com V-ing
must I have been faltering? must you have been faltering? must she have been faltering? must we have been faltering? must you have been faltering? must they have been faltering?
Forma interro-Negação
Forma simple
must I not falter? must you not falter? must she not falter? must we not falter? must you not falter? must they not falter?
Forma com V-ing
must I not be faltering? must you not be faltering? must she not be faltering? must we not be faltering? must you not be faltering? must they not be faltering?
Perfeito
must I not have faltered? must you not have faltered? must she not have faltered? must we not have faltered? must you not have faltered? must they not have faltered?
Perfeito com V-ing
must I not have been faltering? must you not have been faltering? must she not have been faltering? must we not have been faltering? must you not have been faltering? must they not have been faltering?