I must watch you must watch he must watch we must watch you must watch they must watch
Forma con V-ing
I must be watching you must be watching he must be watching we must be watching you must be watching they must be watching
Perfecto
I must have watched you must have watched he must have watched we must have watched you must have watched they must have watched
Perfecto con V-ing
I must have been watching you must have been watching he must have been watching we must have been watching you must have been watching they must have been watching
Negación
Forma simple
I must not watch you must not watch he must not watch we must not watch you must not watch they must not watch
Forma con V-ing
I must not be watching you must not be watching he must not be watching we must not be watching you must not be watching they must not be watching
Perfecto
I must not have watched you must not have watched he must not have watched we must not have watched you must not have watched they must not have watched
Perfecto con V-ing
I must not have been watching you must not have been watching he must not have been watching we must not have been watching you must not have been watching they must not have been watching
Forma interrogativa
Forma simple
must I watch? must you watch? must he watch? must we watch? must you watch? must they watch?
Forma con V-ing
must I be watching? must you be watching? must he be watching? must we be watching? must you be watching? must they be watching?
Perfecto
must I have watched? must you have watched? must he have watched? must we have watched? must you have watched? must they have watched?
Perfecto con V-ing
must I have been watching? must you have been watching? must he have been watching? must we have been watching? must you have been watching? must they have been watching?
Forma interro-negativa
Forma simple
must I not watch? must you not watch? must he not watch? must we not watch? must you not watch? must they not watch?
Forma con V-ing
must I not be watching? must you not be watching? must he not be watching? must we not be watching? must you not be watching? must they not be watching?
Perfecto
must I not have watched? must you not have watched? must he not have watched? must we not have watched? must you not have watched? must they not have watched?
Perfecto con V-ing
must I not have been watching? must you not have been watching? must he not have been watching? must we not have been watching? must you not have been watching? must they not have been watching?