I must sag you must sag he must sag we must sag you must sag they must sag
Forma con V-ing
I must be sagging you must be sagging he must be sagging we must be sagging you must be sagging they must be sagging
Perfecto
I must have sagged you must have sagged he must have sagged we must have sagged you must have sagged they must have sagged
Perfecto con V-ing
I must have been sagging you must have been sagging he must have been sagging we must have been sagging you must have been sagging they must have been sagging
Negación
Forma simple
I must not sag you must not sag he must not sag we must not sag you must not sag they must not sag
Forma con V-ing
I must not be sagging you must not be sagging he must not be sagging we must not be sagging you must not be sagging they must not be sagging
Perfecto
I must not have sagged you must not have sagged he must not have sagged we must not have sagged you must not have sagged they must not have sagged
Perfecto con V-ing
I must not have been sagging you must not have been sagging he must not have been sagging we must not have been sagging you must not have been sagging they must not have been sagging
Forma interrogativa
Forma simple
must I sag? must you sag? must he sag? must we sag? must you sag? must they sag?
Forma con V-ing
must I be sagging? must you be sagging? must he be sagging? must we be sagging? must you be sagging? must they be sagging?
Perfecto
must I have sagged? must you have sagged? must he have sagged? must we have sagged? must you have sagged? must they have sagged?
Perfecto con V-ing
must I have been sagging? must you have been sagging? must he have been sagging? must we have been sagging? must you have been sagging? must they have been sagging?
Forma interro-negativa
Forma simple
must I not sag? must you not sag? must he not sag? must we not sag? must you not sag? must they not sag?
Forma con V-ing
must I not be sagging? must you not be sagging? must he not be sagging? must we not be sagging? must you not be sagging? must they not be sagging?
Perfecto
must I not have sagged? must you not have sagged? must he not have sagged? must we not have sagged? must you not have sagged? must they not have sagged?
Perfecto con V-ing
must I not have been sagging? must you not have been sagging? must he not have been sagging? must we not have been sagging? must you not have been sagging? must they not have been sagging?