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