I must rivet you must rivet he must rivet we must rivet you must rivet they must rivet
Forma con V-ing
I must be riveting you must be riveting he must be riveting we must be riveting you must be riveting they must be riveting
Perfecto
I must have riveted you must have riveted he must have riveted we must have riveted you must have riveted they must have riveted
Perfecto con V-ing
I must have been riveting you must have been riveting he must have been riveting we must have been riveting you must have been riveting they must have been riveting
Negación
Forma simple
I must not rivet you must not rivet he must not rivet we must not rivet you must not rivet they must not rivet
Forma con V-ing
I must not be riveting you must not be riveting he must not be riveting we must not be riveting you must not be riveting they must not be riveting
Perfecto
I must not have riveted you must not have riveted he must not have riveted we must not have riveted you must not have riveted they must not have riveted
Perfecto con V-ing
I must not have been riveting you must not have been riveting he must not have been riveting we must not have been riveting you must not have been riveting they must not have been riveting
Forma interrogativa
Forma simple
must I rivet? must you rivet? must he rivet? must we rivet? must you rivet? must they rivet?
Forma con V-ing
must I be riveting? must you be riveting? must he be riveting? must we be riveting? must you be riveting? must they be riveting?
Perfecto
must I have riveted? must you have riveted? must he have riveted? must we have riveted? must you have riveted? must they have riveted?
Perfecto con V-ing
must I have been riveting? must you have been riveting? must he have been riveting? must we have been riveting? must you have been riveting? must they have been riveting?
Forma interro-negativa
Forma simple
must I not rivet? must you not rivet? must he not rivet? must we not rivet? must you not rivet? must they not rivet?
Forma con V-ing
must I not be riveting? must you not be riveting? must he not be riveting? must we not be riveting? must you not be riveting? must they not be riveting?
Perfecto
must I not have riveted? must you not have riveted? must he not have riveted? must we not have riveted? must you not have riveted? must they not have riveted?
Perfecto con V-ing
must I not have been riveting? must you not have been riveting? must he not have been riveting? must we not have been riveting? must you not have been riveting? must they not have been riveting?