I must contact you must contact he must contact we must contact you must contact they must contact
Forma con V-ing
I must be contacting you must be contacting he must be contacting we must be contacting you must be contacting they must be contacting
Perfecto
I must have contacted you must have contacted he must have contacted we must have contacted you must have contacted they must have contacted
Perfecto con V-ing
I must have been contacting you must have been contacting he must have been contacting we must have been contacting you must have been contacting they must have been contacting
Negación
Forma simple
I must not contact you must not contact he must not contact we must not contact you must not contact they must not contact
Forma con V-ing
I must not be contacting you must not be contacting he must not be contacting we must not be contacting you must not be contacting they must not be contacting
Perfecto
I must not have contacted you must not have contacted he must not have contacted we must not have contacted you must not have contacted they must not have contacted
Perfecto con V-ing
I must not have been contacting you must not have been contacting he must not have been contacting we must not have been contacting you must not have been contacting they must not have been contacting
Forma interrogativa
Forma simple
must I contact? must you contact? must he contact? must we contact? must you contact? must they contact?
Forma con V-ing
must I be contacting? must you be contacting? must he be contacting? must we be contacting? must you be contacting? must they be contacting?
Perfecto
must I have contacted? must you have contacted? must he have contacted? must we have contacted? must you have contacted? must they have contacted?
Perfecto con V-ing
must I have been contacting? must you have been contacting? must he have been contacting? must we have been contacting? must you have been contacting? must they have been contacting?
Forma interro-negativa
Forma simple
must I not contact? must you not contact? must he not contact? must we not contact? must you not contact? must they not contact?
Forma con V-ing
must I not be contacting? must you not be contacting? must he not be contacting? must we not be contacting? must you not be contacting? must they not be contacting?
Perfecto
must I not have contacted? must you not have contacted? must he not have contacted? must we not have contacted? must you not have contacted? must they not have contacted?
Perfecto con V-ing
must I not have been contacting? must you not have been contacting? must he not have been contacting? must we not have been contacting? must you not have been contacting? must they not have been contacting?