I must perdure you must perdure she must perdure we must perdure you must perdure they must perdure
Forma con V-ing
I must be perduring you must be perduring she must be perduring we must be perduring you must be perduring they must be perduring
Perfecto
I must have perdured you must have perdured she must have perdured we must have perdured you must have perdured they must have perdured
Perfecto con V-ing
I must have been perduring you must have been perduring she must have been perduring we must have been perduring you must have been perduring they must have been perduring
Negación
Forma simple
I must not perdure you must not perdure she must not perdure we must not perdure you must not perdure they must not perdure
Forma con V-ing
I must not be perduring you must not be perduring she must not be perduring we must not be perduring you must not be perduring they must not be perduring
Perfecto
I must not have perdured you must not have perdured she must not have perdured we must not have perdured you must not have perdured they must not have perdured
Perfecto con V-ing
I must not have been perduring you must not have been perduring she must not have been perduring we must not have been perduring you must not have been perduring they must not have been perduring
Forma interrogativa
Forma simple
must I perdure? must you perdure? must she perdure? must we perdure? must you perdure? must they perdure?
Forma con V-ing
must I be perduring? must you be perduring? must she be perduring? must we be perduring? must you be perduring? must they be perduring?
Perfecto
must I have perdured? must you have perdured? must she have perdured? must we have perdured? must you have perdured? must they have perdured?
Perfecto con V-ing
must I have been perduring? must you have been perduring? must she have been perduring? must we have been perduring? must you have been perduring? must they have been perduring?
Forma interro-negativa
Forma simple
must I not perdure? must you not perdure? must she not perdure? must we not perdure? must you not perdure? must they not perdure?
Forma con V-ing
must I not be perduring? must you not be perduring? must she not be perduring? must we not be perduring? must you not be perduring? must they not be perduring?
Perfecto
must I not have perdured? must you not have perdured? must she not have perdured? must we not have perdured? must you not have perdured? must they not have perdured?
Perfecto con V-ing
must I not have been perduring? must you not have been perduring? must she not have been perduring? must we not have been perduring? must you not have been perduring? must they not have been perduring?