I must underlay you must underlay he must underlay we must underlay you must underlay they must underlay
Forma con V-ing
I must be underlaying you must be underlaying he must be underlaying we must be underlaying you must be underlaying they must be underlaying
Perfecto
I must have underlaid you must have underlaid he must have underlaid we must have underlaid you must have underlaid they must have underlaid
Perfecto con V-ing
I must have been underlaying you must have been underlaying he must have been underlaying we must have been underlaying you must have been underlaying they must have been underlaying
Negación
Forma simple
I must not underlay you must not underlay he must not underlay we must not underlay you must not underlay they must not underlay
Forma con V-ing
I must not be underlaying you must not be underlaying he must not be underlaying we must not be underlaying you must not be underlaying they must not be underlaying
Perfecto
I must not have underlaid you must not have underlaid he must not have underlaid we must not have underlaid you must not have underlaid they must not have underlaid
Perfecto con V-ing
I must not have been underlaying you must not have been underlaying he must not have been underlaying we must not have been underlaying you must not have been underlaying they must not have been underlaying
Forma interrogativa
Forma simple
must I underlay? must you underlay? must he underlay? must we underlay? must you underlay? must they underlay?
Forma con V-ing
must I be underlaying? must you be underlaying? must he be underlaying? must we be underlaying? must you be underlaying? must they be underlaying?
Perfecto
must I have underlaid? must you have underlaid? must he have underlaid? must we have underlaid? must you have underlaid? must they have underlaid?
Perfecto con V-ing
must I have been underlaying? must you have been underlaying? must he have been underlaying? must we have been underlaying? must you have been underlaying? must they have been underlaying?
Forma interro-negativa
Forma simple
must I not underlay? must you not underlay? must he not underlay? must we not underlay? must you not underlay? must they not underlay?
Forma con V-ing
must I not be underlaying? must you not be underlaying? must he not be underlaying? must we not be underlaying? must you not be underlaying? must they not be underlaying?
Perfecto
must I not have underlaid? must you not have underlaid? must he not have underlaid? must we not have underlaid? must you not have underlaid? must they not have underlaid?
Perfecto con V-ing
must I not have been underlaying? must you not have been underlaying? must he not have been underlaying? must we not have been underlaying? must you not have been underlaying? must they not have been underlaying?