I must oblige you must oblige he must oblige we must oblige you must oblige they must oblige
Forma con V-ing
I must be obliging you must be obliging he must be obliging we must be obliging you must be obliging they must be obliging
Perfecto
I must have obliged you must have obliged he must have obliged we must have obliged you must have obliged they must have obliged
Perfecto con V-ing
I must have been obliging you must have been obliging he must have been obliging we must have been obliging you must have been obliging they must have been obliging
Negación
Forma simple
I must not oblige you must not oblige he must not oblige we must not oblige you must not oblige they must not oblige
Forma con V-ing
I must not be obliging you must not be obliging he must not be obliging we must not be obliging you must not be obliging they must not be obliging
Perfecto
I must not have obliged you must not have obliged he must not have obliged we must not have obliged you must not have obliged they must not have obliged
Perfecto con V-ing
I must not have been obliging you must not have been obliging he must not have been obliging we must not have been obliging you must not have been obliging they must not have been obliging
Forma interrogativa
Forma simple
must I oblige? must you oblige? must he oblige? must we oblige? must you oblige? must they oblige?
Forma con V-ing
must I be obliging? must you be obliging? must he be obliging? must we be obliging? must you be obliging? must they be obliging?
Perfecto
must I have obliged? must you have obliged? must he have obliged? must we have obliged? must you have obliged? must they have obliged?
Perfecto con V-ing
must I have been obliging? must you have been obliging? must he have been obliging? must we have been obliging? must you have been obliging? must they have been obliging?
Forma interro-negativa
Forma simple
must I not oblige? must you not oblige? must he not oblige? must we not oblige? must you not oblige? must they not oblige?
Forma con V-ing
must I not be obliging? must you not be obliging? must he not be obliging? must we not be obliging? must you not be obliging? must they not be obliging?
Perfecto
must I not have obliged? must you not have obliged? must he not have obliged? must we not have obliged? must you not have obliged? must they not have obliged?
Perfecto con V-ing
must I not have been obliging? must you not have been obliging? must he not have been obliging? must we not have been obliging? must you not have been obliging? must they not have been obliging?