I must travail you must travail he must travail we must travail you must travail they must travail
Forma con V-ing
I must be travailing you must be travailing he must be travailing we must be travailing you must be travailing they must be travailing
Perfecto
I must have travailed you must have travailed he 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 he must have been travailing we must have been travailing you must have been travailing they must have been travailing
Negación
Forma simple
I must not travail you must not travail he must not travail we must not travail you must not travail they must not travail
Forma con V-ing
I must not be travailing you must not be travailing he must not be travailing we must not be travailing you must not be travailing they must not be travailing
Perfecto
I must not have travailed you must not have travailed he must not have travailed we must not have travailed you must not have travailed they must not have travailed
Perfecto con V-ing
I must not have been travailing you must not have been travailing he must not have been travailing we must not have been travailing you must not have been travailing they must not have been travailing
Forma interrogativa
Forma simple
must I travail? must you travail? must he travail? must we travail? must you travail? must they travail?
Forma con V-ing
must I be travailing? must you be travailing? must he be travailing? must we be travailing? must you be travailing? must they be travailing?
Perfecto
must I have travailed? must you have travailed? must he 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 he have been travailing? must we have been travailing? must you have been travailing? must they have been travailing?
Forma interro-negativa
Forma simple
must I not travail? must you not travail? must he not travail? must we not travail? must you not travail? must they not travail?
Forma con V-ing
must I not be travailing? must you not be travailing? must he not be travailing? must we not be travailing? must you not be travailing? must they not be travailing?
Perfecto
must I not have travailed? must you not have travailed? must he not have travailed? must we not have travailed? must you not have travailed? must they not have travailed?
Perfecto con V-ing
must I not have been travailing? must you not have been travailing? must he not have been travailing? must we not have been travailing? must you not have been travailing? must they not have been travailing?