I must bus you must bus he must bus we must bus you must bus they must bus
Forma con V-ing
I must be bussing you must be bussing he must be bussing we must be bussing you must be bussing they must be bussing
Perfecto
I must have bussed you must have bussed he must have bussed we must have bussed you must have bussed they must have bussed
Perfecto con V-ing
I must have been bussing you must have been bussing he must have been bussing we must have been bussing you must have been bussing they must have been bussing
Negación
Forma simple
I must not bus you must not bus he must not bus we must not bus you must not bus they must not bus
Forma con V-ing
I must not be bussing you must not be bussing he must not be bussing we must not be bussing you must not be bussing they must not be bussing
Perfecto
I must not have bussed you must not have bussed he must not have bussed we must not have bussed you must not have bussed they must not have bussed
Perfecto con V-ing
I must not have been bussing you must not have been bussing he must not have been bussing we must not have been bussing you must not have been bussing they must not have been bussing
Forma interrogativa
Forma simple
must I bus? must you bus? must he bus? must we bus? must you bus? must they bus?
Forma con V-ing
must I be bussing? must you be bussing? must he be bussing? must we be bussing? must you be bussing? must they be bussing?
Perfecto
must I have bussed? must you have bussed? must he have bussed? must we have bussed? must you have bussed? must they have bussed?
Perfecto con V-ing
must I have been bussing? must you have been bussing? must he have been bussing? must we have been bussing? must you have been bussing? must they have been bussing?
Forma interro-negativa
Forma simple
must I not bus? must you not bus? must he not bus? must we not bus? must you not bus? must they not bus?
Forma con V-ing
must I not be bussing? must you not be bussing? must he not be bussing? must we not be bussing? must you not be bussing? must they not be bussing?
Perfecto
must I not have bussed? must you not have bussed? must he not have bussed? must we not have bussed? must you not have bussed? must they not have bussed?
Perfecto con V-ing
must I not have been bussing? must you not have been bussing? must he not have been bussing? must we not have been bussing? must you not have been bussing? must they not have been bussing?