I must stamp you must stamp he must stamp we must stamp you must stamp they must stamp
Forma con V-ing
I must be stamping you must be stamping he must be stamping we must be stamping you must be stamping they must be stamping
Perfecto
I must have stamped you must have stamped he must have stamped we must have stamped you must have stamped they must have stamped
Perfecto con V-ing
I must have been stamping you must have been stamping he must have been stamping we must have been stamping you must have been stamping they must have been stamping
Negación
Forma simple
I mustn't stamp you mustn't stamp he mustn't stamp we mustn't stamp you mustn't stamp they mustn't stamp
Forma con V-ing
I mustn't be stamping you mustn't be stamping he mustn't be stamping we mustn't be stamping you mustn't be stamping they mustn't be stamping
Perfecto
I mustn't have stamped you mustn't have stamped he mustn't have stamped we mustn't have stamped you mustn't have stamped they mustn't have stamped
Perfecto con V-ing
I mustn't have been stamping you mustn't have been stamping he mustn't have been stamping we mustn't have been stamping you mustn't have been stamping they mustn't have been stamping
Forma interrogativa
Forma simple
must I stamp? must you stamp? must he stamp? must we stamp? must you stamp? must they stamp?
Forma con V-ing
must I be stamping? must you be stamping? must he be stamping? must we be stamping? must you be stamping? must they be stamping?
Perfecto
must I have stamped? must you have stamped? must he have stamped? must we have stamped? must you have stamped? must they have stamped?
Perfecto con V-ing
must I have been stamping? must you have been stamping? must he have been stamping? must we have been stamping? must you have been stamping? must they have been stamping?
Forma interro-negativa
Forma simple
mustn't I stamp? mustn't you stamp? mustn't he stamp? mustn't we stamp? mustn't you stamp? mustn't they stamp?
Forma con V-ing
mustn't I be stamping? mustn't you be stamping? mustn't he be stamping? mustn't we be stamping? mustn't you be stamping? mustn't they be stamping?
Perfecto
mustn't I have stamped? mustn't you have stamped? mustn't he have stamped? mustn't we have stamped? mustn't you have stamped? mustn't they have stamped?
Perfecto con V-ing
mustn't I have been stamping? mustn't you have been stamping? mustn't he have been stamping? mustn't we have been stamping? mustn't you have been stamping? mustn't they have been stamping?