I must time you must time he must time we must time you must time they must time
Forma con V-ing
I must be timing you must be timing he must be timing we must be timing you must be timing they must be timing
Perfecto
I must have timed you must have timed he must have timed we must have timed you must have timed they must have timed
Perfecto con V-ing
I must have been timing you must have been timing he must have been timing we must have been timing you must have been timing they must have been timing
Negación
Forma simple
I must not time you must not time he must not time we must not time you must not time they must not time
Forma con V-ing
I must not be timing you must not be timing he must not be timing we must not be timing you must not be timing they must not be timing
Perfecto
I must not have timed you must not have timed he must not have timed we must not have timed you must not have timed they must not have timed
Perfecto con V-ing
I must not have been timing you must not have been timing he must not have been timing we must not have been timing you must not have been timing they must not have been timing
Forma interrogativa
Forma simple
must I time? must you time? must he time? must we time? must you time? must they time?
Forma con V-ing
must I be timing? must you be timing? must he be timing? must we be timing? must you be timing? must they be timing?
Perfecto
must I have timed? must you have timed? must he have timed? must we have timed? must you have timed? must they have timed?
Perfecto con V-ing
must I have been timing? must you have been timing? must he have been timing? must we have been timing? must you have been timing? must they have been timing?
Forma interro-negativa
Forma simple
must I not time? must you not time? must he not time? must we not time? must you not time? must they not time?
Forma con V-ing
must I not be timing? must you not be timing? must he not be timing? must we not be timing? must you not be timing? must they not be timing?
Perfecto
must I not have timed? must you not have timed? must he not have timed? must we not have timed? must you not have timed? must they not have timed?
Perfecto con V-ing
must I not have been timing? must you not have been timing? must he not have been timing? must we not have been timing? must you not have been timing? must they not have been timing?