I must heat you must heat he must heat we must heat you must heat they must heat
Forma con V-ing
I must be heating you must be heating he must be heating we must be heating you must be heating they must be heating
Perfecto
I must have heated you must have heated he must have heated we must have heated you must have heated they must have heated
Perfecto con V-ing
I must have been heating you must have been heating he must have been heating we must have been heating you must have been heating they must have been heating
Negación
Forma simple
I mustn't heat you mustn't heat he mustn't heat we mustn't heat you mustn't heat they mustn't heat
Forma con V-ing
I mustn't be heating you mustn't be heating he mustn't be heating we mustn't be heating you mustn't be heating they mustn't be heating
Perfecto
I mustn't have heated you mustn't have heated he mustn't have heated we mustn't have heated you mustn't have heated they mustn't have heated
Perfecto con V-ing
I mustn't have been heating you mustn't have been heating he mustn't have been heating we mustn't have been heating you mustn't have been heating they mustn't have been heating
Forma interrogativa
Forma simple
must I heat? must you heat? must he heat? must we heat? must you heat? must they heat?
Forma con V-ing
must I be heating? must you be heating? must he be heating? must we be heating? must you be heating? must they be heating?
Perfecto
must I have heated? must you have heated? must he have heated? must we have heated? must you have heated? must they have heated?
Perfecto con V-ing
must I have been heating? must you have been heating? must he have been heating? must we have been heating? must you have been heating? must they have been heating?
Forma interro-negativa
Forma simple
mustn't I heat? mustn't you heat? mustn't he heat? mustn't we heat? mustn't you heat? mustn't they heat?
Forma con V-ing
mustn't I be heating? mustn't you be heating? mustn't he be heating? mustn't we be heating? mustn't you be heating? mustn't they be heating?
Perfecto
mustn't I have heated? mustn't you have heated? mustn't he have heated? mustn't we have heated? mustn't you have heated? mustn't they have heated?
Perfecto con V-ing
mustn't I have been heating? mustn't you have been heating? mustn't he have been heating? mustn't we have been heating? mustn't you have been heating? mustn't they have been heating?