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