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