should guard
Verbo regular: guard - guarded- guarded

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

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

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

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