I must bus you must bus she must bus we must bus you must bus they must bus
Forma con V-ing
I must be bussing you must be bussing she must be bussing we must be bussing you must be bussing they must be bussing
Perfecto
I must have bussed you must have bussed she 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 she must have been bussing we must have been bussing you must have been bussing they must have been bussing
Negación
Forma simple
I mustn't bus you mustn't bus she mustn't bus we mustn't bus you mustn't bus they mustn't bus
Forma con V-ing
I mustn't be bussing you mustn't be bussing she mustn't be bussing we mustn't be bussing you mustn't be bussing they mustn't be bussing
Perfecto
I mustn't have bussed you mustn't have bussed she mustn't have bussed we mustn't have bussed you mustn't have bussed they mustn't have bussed
Perfecto con V-ing
I mustn't have been bussing you mustn't have been bussing she mustn't have been bussing we mustn't have been bussing you mustn't have been bussing they mustn't have been bussing
Forma interrogativa
Forma simple
must I bus? must you bus? must she bus? must we bus? must you bus? must they bus?
Forma con V-ing
must I be bussing? must you be bussing? must she be bussing? must we be bussing? must you be bussing? must they be bussing?
Perfecto
must I have bussed? must you have bussed? must she 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 she have been bussing? must we have been bussing? must you have been bussing? must they have been bussing?
Forma interro-negativa
Forma simple
mustn't I bus? mustn't you bus? mustn't she bus? mustn't we bus? mustn't you bus? mustn't they bus?
Forma con V-ing
mustn't I be bussing? mustn't you be bussing? mustn't she be bussing? mustn't we be bussing? mustn't you be bussing? mustn't they be bussing?
Perfecto
mustn't I have bussed? mustn't you have bussed? mustn't she have bussed? mustn't we have bussed? mustn't you have bussed? mustn't they have bussed?
Perfecto con V-ing
mustn't I have been bussing? mustn't you have been bussing? mustn't she have been bussing? mustn't we have been bussing? mustn't you have been bussing? mustn't they have been bussing?