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