Conjugación del verbo inglés
MUST EXCUSE

Verbo regular: excuse - excused - excused

Afirmación

Forma simple	Forma con V-ing
I must excuse you must excuse he must excuse we must excuse you must excuse they must excuse	I must be excusing you must be excusing he must be excusing we must be excusing you must be excusing they must be excusing
Perfecto	Perfecto con V-ing
I must have excused you must have excused he must have excused we must have excused you must have excused they must have excused	I must have been excusing you must have been excusing he must have been excusing we must have been excusing you must have been excusing they must have been excusing

Negación

Forma simple	Forma con V-ing
I must not excuse you must not excuse he must not excuse we must not excuse you must not excuse they must not excuse	I must not be excusing you must not be excusing he must not be excusing we must not be excusing you must not be excusing they must not be excusing
Perfecto	Perfecto con V-ing
I must not have excused you must not have excused he must not have excused we must not have excused you must not have excused they must not have excused	I must not have been excusing you must not have been excusing he must not have been excusing we must not have been excusing you must not have been excusing they must not have been excusing

Forma interrogativa

Forma simple	Forma con V-ing
must I excuse? must you excuse? must he excuse? must we excuse? must you excuse? must they excuse?	must I be excusing? must you be excusing? must he be excusing? must we be excusing? must you be excusing? must they be excusing?
Perfecto	Perfecto con V-ing
must I have excused? must you have excused? must he have excused? must we have excused? must you have excused? must they have excused?	must I have been excusing? must you have been excusing? must he have been excusing? must we have been excusing? must you have been excusing? must they have been excusing?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not excuse? must you not excuse? must he not excuse? must we not excuse? must you not excuse? must they not excuse?	must I not be excusing? must you not be excusing? must he not be excusing? must we not be excusing? must you not be excusing? must they not be excusing?
Perfecto	Perfecto con V-ing
must I not have excused? must you not have excused? must he not have excused? must we not have excused? must you not have excused? must they not have excused?	must I not have been excusing? must you not have been excusing? must he not have been excusing? must we not have been excusing? must you not have been excusing? must they not have been excusing?