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