I must pierce you must pierce he must pierce we must pierce you must pierce they must pierce
Forma con V-ing
I must be piercing you must be piercing he must be piercing we must be piercing you must be piercing they must be piercing
Perfecto
I must have pierced you must have pierced he must have pierced we must have pierced you must have pierced they must have pierced
Perfecto con V-ing
I must have been piercing you must have been piercing he must have been piercing we must have been piercing you must have been piercing they must have been piercing
Negación
Forma simple
I must not pierce you must not pierce he must not pierce we must not pierce you must not pierce they must not pierce
Forma con V-ing
I must not be piercing you must not be piercing he must not be piercing we must not be piercing you must not be piercing they must not be piercing
Perfecto
I must not have pierced you must not have pierced he must not have pierced we must not have pierced you must not have pierced they must not have pierced
Perfecto con V-ing
I must not have been piercing you must not have been piercing he must not have been piercing we must not have been piercing you must not have been piercing they must not have been piercing
Forma interrogativa
Forma simple
must I pierce? must you pierce? must he pierce? must we pierce? must you pierce? must they pierce?
Forma con V-ing
must I be piercing? must you be piercing? must he be piercing? must we be piercing? must you be piercing? must they be piercing?
Perfecto
must I have pierced? must you have pierced? must he have pierced? must we have pierced? must you have pierced? must they have pierced?
Perfecto con V-ing
must I have been piercing? must you have been piercing? must he have been piercing? must we have been piercing? must you have been piercing? must they have been piercing?
Forma interro-negativa
Forma simple
must I not pierce? must you not pierce? must he not pierce? must we not pierce? must you not pierce? must they not pierce?
Forma con V-ing
must I not be piercing? must you not be piercing? must he not be piercing? must we not be piercing? must you not be piercing? must they not be piercing?
Perfecto
must I not have pierced? must you not have pierced? must he not have pierced? must we not have pierced? must you not have pierced? must they not have pierced?
Perfecto con V-ing
must I not have been piercing? must you not have been piercing? must he not have been piercing? must we not have been piercing? must you not have been piercing? must they not have been piercing?