I must prealter you must prealter she must prealter we must prealter you must prealter they must prealter
Forma con V-ing
I must be prealtering you must be prealtering she must be prealtering we must be prealtering you must be prealtering they must be prealtering
Perfecto
I must have prealtered you must have prealtered she must have prealtered we must have prealtered you must have prealtered they must have prealtered
Perfecto con V-ing
I must have been prealtering you must have been prealtering she must have been prealtering we must have been prealtering you must have been prealtering they must have been prealtering
Negación
Forma simple
I must not prealter you must not prealter she must not prealter we must not prealter you must not prealter they must not prealter
Forma con V-ing
I must not be prealtering you must not be prealtering she must not be prealtering we must not be prealtering you must not be prealtering they must not be prealtering
Perfecto
I must not have prealtered you must not have prealtered she must not have prealtered we must not have prealtered you must not have prealtered they must not have prealtered
Perfecto con V-ing
I must not have been prealtering you must not have been prealtering she must not have been prealtering we must not have been prealtering you must not have been prealtering they must not have been prealtering
Forma interrogativa
Forma simple
must I prealter? must you prealter? must she prealter? must we prealter? must you prealter? must they prealter?
Forma con V-ing
must I be prealtering? must you be prealtering? must she be prealtering? must we be prealtering? must you be prealtering? must they be prealtering?
Perfecto
must I have prealtered? must you have prealtered? must she have prealtered? must we have prealtered? must you have prealtered? must they have prealtered?
Perfecto con V-ing
must I have been prealtering? must you have been prealtering? must she have been prealtering? must we have been prealtering? must you have been prealtering? must they have been prealtering?
Forma interro-negativa
Forma simple
must I not prealter? must you not prealter? must she not prealter? must we not prealter? must you not prealter? must they not prealter?
Forma con V-ing
must I not be prealtering? must you not be prealtering? must she not be prealtering? must we not be prealtering? must you not be prealtering? must they not be prealtering?
Perfecto
must I not have prealtered? must you not have prealtered? must she not have prealtered? must we not have prealtered? must you not have prealtered? must they not have prealtered?
Perfecto con V-ing
must I not have been prealtering? must you not have been prealtering? must she not have been prealtering? must we not have been prealtering? must you not have been prealtering? must they not have been prealtering?