I must stale you must stale she must stale we must stale you must stale they must stale
Forma con V-ing
I must be staling you must be staling she must be staling we must be staling you must be staling they must be staling
Perfecto
I must have staled you must have staled she must have staled we must have staled you must have staled they must have staled
Perfecto con V-ing
I must have been staling you must have been staling she must have been staling we must have been staling you must have been staling they must have been staling
Negación
Forma simple
I must not stale you must not stale she must not stale we must not stale you must not stale they must not stale
Forma con V-ing
I must not be staling you must not be staling she must not be staling we must not be staling you must not be staling they must not be staling
Perfecto
I must not have staled you must not have staled she must not have staled we must not have staled you must not have staled they must not have staled
Perfecto con V-ing
I must not have been staling you must not have been staling she must not have been staling we must not have been staling you must not have been staling they must not have been staling
Forma interrogativa
Forma simple
must I stale? must you stale? must she stale? must we stale? must you stale? must they stale?
Forma con V-ing
must I be staling? must you be staling? must she be staling? must we be staling? must you be staling? must they be staling?
Perfecto
must I have staled? must you have staled? must she have staled? must we have staled? must you have staled? must they have staled?
Perfecto con V-ing
must I have been staling? must you have been staling? must she have been staling? must we have been staling? must you have been staling? must they have been staling?
Forma interro-negativa
Forma simple
must I not stale? must you not stale? must she not stale? must we not stale? must you not stale? must they not stale?
Forma con V-ing
must I not be staling? must you not be staling? must she not be staling? must we not be staling? must you not be staling? must they not be staling?
Perfecto
must I not have staled? must you not have staled? must she not have staled? must we not have staled? must you not have staled? must they not have staled?
Perfecto con V-ing
must I not have been staling? must you not have been staling? must she not have been staling? must we not have been staling? must you not have been staling? must they not have been staling?