I must prevail you must prevail she must prevail we must prevail you must prevail they must prevail
Forma con V-ing
I must be prevailing you must be prevailing she must be prevailing we must be prevailing you must be prevailing they must be prevailing
Perfecto
I must have prevailed you must have prevailed she must have prevailed we must have prevailed you must have prevailed they must have prevailed
Perfecto con V-ing
I must have been prevailing you must have been prevailing she must have been prevailing we must have been prevailing you must have been prevailing they must have been prevailing
Negación
Forma simple
I mustn't prevail you mustn't prevail she mustn't prevail we mustn't prevail you mustn't prevail they mustn't prevail
Forma con V-ing
I mustn't be prevailing you mustn't be prevailing she mustn't be prevailing we mustn't be prevailing you mustn't be prevailing they mustn't be prevailing
Perfecto
I mustn't have prevailed you mustn't have prevailed she mustn't have prevailed we mustn't have prevailed you mustn't have prevailed they mustn't have prevailed
Perfecto con V-ing
I mustn't have been prevailing you mustn't have been prevailing she mustn't have been prevailing we mustn't have been prevailing you mustn't have been prevailing they mustn't have been prevailing
Forma interrogativa
Forma simple
must I prevail? must you prevail? must she prevail? must we prevail? must you prevail? must they prevail?
Forma con V-ing
must I be prevailing? must you be prevailing? must she be prevailing? must we be prevailing? must you be prevailing? must they be prevailing?
Perfecto
must I have prevailed? must you have prevailed? must she have prevailed? must we have prevailed? must you have prevailed? must they have prevailed?
Perfecto con V-ing
must I have been prevailing? must you have been prevailing? must she have been prevailing? must we have been prevailing? must you have been prevailing? must they have been prevailing?
Forma interro-negativa
Forma simple
mustn't I prevail? mustn't you prevail? mustn't she prevail? mustn't we prevail? mustn't you prevail? mustn't they prevail?
Forma con V-ing
mustn't I be prevailing? mustn't you be prevailing? mustn't she be prevailing? mustn't we be prevailing? mustn't you be prevailing? mustn't they be prevailing?
Perfecto
mustn't I have prevailed? mustn't you have prevailed? mustn't she have prevailed? mustn't we have prevailed? mustn't you have prevailed? mustn't they have prevailed?
Perfecto con V-ing
mustn't I have been prevailing? mustn't you have been prevailing? mustn't she have been prevailing? mustn't we have been prevailing? mustn't you have been prevailing? mustn't they have been prevailing?