can guard
Regular verb: guard - guarded- guarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can guard
you can guard
she can guard
we can guard
you can guard
they can guard 	I can be guarding
you can be guarding
she can be guarding
we can be guarding
you can be guarding
they can be guarding	I can have guarded
you can have guarded
she can have guarded
we can have guarded
you can have guarded
they can have guarded	I can have been guarding
you can have been guarding
she can have been guarding
we can have been guarding
you can have been guarding
they can have been guarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot guard
you cannot guard
she cannot guard
we cannot guard
you cannot guard
they cannot guard 	I cannot be guarding
you cannot be guarding
she cannot be guarding
we cannot be guarding
you cannot be guarding
they cannot be guarding	I cannot have guarded
you cannot have guarded
she cannot have guarded
we cannot have guarded
you cannot have guarded
they cannot have guarded	I cannot have been guarding
you cannot have been guarding
she cannot have been guarding
we cannot have been guarding
you cannot have been guarding
they cannot have been guarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I guard?
can you guard?
can she guard?
can we guard?
can you guard?
can they guard? 	can I be guarding?
can you be guarding?
can she be guarding?
can we be guarding?
can you be guarding?
can they be guarding? 	can I have guarded?
can you have guarded?
can she have guarded?
can we have guarded?
can you have guarded?
can they have guarded? 	can I have been guarding?
can you have been guarding?
can she have been guarding?
can we have been guarding?
can you have been guarding?
can they have been guarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not guard?
can you not guard?
can she not guard?
can we not guard?
can you not guard?
can they not guard? 	can I not be guarding?
can you not be guarding?
can she not be guarding?
can we not be guarding?
can you not be guarding?
can they not be guarding? 	can I not have guarded?
can you not have guarded?
can she not have guarded?
can we not have guarded?
can you not have guarded?
can they not have guarded? 	can I not have been guarding?
can you not have been guarding?
can she not have been guarding?
can we not have been guarding?
can you not have been guarding?
can they not have been guarding?