I must refasten you must refasten he must refasten we must refasten you must refasten they must refasten
Forma con V-ing
I must be refastening you must be refastening he must be refastening we must be refastening you must be refastening they must be refastening
Perfecto
I must have refastened you must have refastened he must have refastened we must have refastened you must have refastened they must have refastened
Perfecto con V-ing
I must have been refastening you must have been refastening he must have been refastening we must have been refastening you must have been refastening they must have been refastening
Negación
Forma simple
I must not refasten you must not refasten he must not refasten we must not refasten you must not refasten they must not refasten
Forma con V-ing
I must not be refastening you must not be refastening he must not be refastening we must not be refastening you must not be refastening they must not be refastening
Perfecto
I must not have refastened you must not have refastened he must not have refastened we must not have refastened you must not have refastened they must not have refastened
Perfecto con V-ing
I must not have been refastening you must not have been refastening he must not have been refastening we must not have been refastening you must not have been refastening they must not have been refastening
Forma interrogativa
Forma simple
must I refasten? must you refasten? must he refasten? must we refasten? must you refasten? must they refasten?
Forma con V-ing
must I be refastening? must you be refastening? must he be refastening? must we be refastening? must you be refastening? must they be refastening?
Perfecto
must I have refastened? must you have refastened? must he have refastened? must we have refastened? must you have refastened? must they have refastened?
Perfecto con V-ing
must I have been refastening? must you have been refastening? must he have been refastening? must we have been refastening? must you have been refastening? must they have been refastening?
Forma interro-negativa
Forma simple
must I not refasten? must you not refasten? must he not refasten? must we not refasten? must you not refasten? must they not refasten?
Forma con V-ing
must I not be refastening? must you not be refastening? must he not be refastening? must we not be refastening? must you not be refastening? must they not be refastening?
Perfecto
must I not have refastened? must you not have refastened? must he not have refastened? must we not have refastened? must you not have refastened? must they not have refastened?
Perfecto con V-ing
must I not have been refastening? must you not have been refastening? must he not have been refastening? must we not have been refastening? must you not have been refastening? must they not have been refastening?