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