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