must guard
Verbo regular: guard - guarded- guarded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must guard
you must guard
he must guard
we must guard
you must guard
they must guard 	I must be guarding
you must be guarding
he must be guarding
we must be guarding
you must be guarding
they must be guarding	I must have guarded
you must have guarded
he must have guarded
we must have guarded
you must have guarded
they must have guarded	I must have been guarding
you must have been guarding
he must have been guarding
we must have been guarding
you must have been guarding
they must have been guarding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not guard
you must not guard
he must not guard
we must not guard
you must not guard
they must not guard 	I must not be guarding
you must not be guarding
he must not be guarding
we must not be guarding
you must not be guarding
they must not be guarding	I must not have guarded
you must not have guarded
he must not have guarded
we must not have guarded
you must not have guarded
they must not have guarded	I must not have been guarding
you must not have been guarding
he must not have been guarding
we must not have been guarding
you must not have been guarding
they must not have been guarding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I guard?
must you guard?
must he guard?
must we guard?
must you guard?
must they guard? 	must I be guarding?
must you be guarding?
must he be guarding?
must we be guarding?
must you be guarding?
must they be guarding? 	must I have guarded?
must you have guarded?
must he have guarded?
must we have guarded?
must you have guarded?
must they have guarded? 	must I have been guarding?
must you have been guarding?
must he have been guarding?
must we have been guarding?
must you have been guarding?
must they have been guarding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not guard?
must you not guard?
must he not guard?
must we not guard?
must you not guard?
must they not guard? 	must I not be guarding?
must you not be guarding?
must he not be guarding?
must we not be guarding?
must you not be guarding?
must they not be guarding? 	must I not have guarded?
must you not have guarded?
must he not have guarded?
must we not have guarded?
must you not have guarded?
must they not have guarded? 	must I not have been guarding?
must you not have been guarding?
must he not have been guarding?
must we not have been guarding?
must you not have been guarding?
must they not have been guarding?