I must arc you must arc he must arc we must arc you must arc they must arc
Forma con V-ing
I must be arcing you must be arcing he must be arcing we must be arcing you must be arcing they must be arcing
Perfecto
I must have arced you must have arced he must have arced we must have arced you must have arced they must have arced
Perfecto con V-ing
I must have been arcing you must have been arcing he must have been arcing we must have been arcing you must have been arcing they must have been arcing
Negación
Forma simple
I must not arc you must not arc he must not arc we must not arc you must not arc they must not arc
Forma con V-ing
I must not be arcing you must not be arcing he must not be arcing we must not be arcing you must not be arcing they must not be arcing
Perfecto
I must not have arced you must not have arced he must not have arced we must not have arced you must not have arced they must not have arced
Perfecto con V-ing
I must not have been arcing you must not have been arcing he must not have been arcing we must not have been arcing you must not have been arcing they must not have been arcing
Forma interrogativa
Forma simple
must I arc? must you arc? must he arc? must we arc? must you arc? must they arc?
Forma con V-ing
must I be arcing? must you be arcing? must he be arcing? must we be arcing? must you be arcing? must they be arcing?
Perfecto
must I have arced? must you have arced? must he have arced? must we have arced? must you have arced? must they have arced?
Perfecto con V-ing
must I have been arcing? must you have been arcing? must he have been arcing? must we have been arcing? must you have been arcing? must they have been arcing?
Forma interro-negativa
Forma simple
must I not arc? must you not arc? must he not arc? must we not arc? must you not arc? must they not arc?
Forma con V-ing
must I not be arcing? must you not be arcing? must he not be arcing? must we not be arcing? must you not be arcing? must they not be arcing?
Perfecto
must I not have arced? must you not have arced? must he not have arced? must we not have arced? must you not have arced? must they not have arced?
Perfecto con V-ing
must I not have been arcing? must you not have been arcing? must he not have been arcing? must we not have been arcing? must you not have been arcing? must they not have been arcing?