could guard
Regular verb: guard - guarded- guarded

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

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

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

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