could harbor
Regular verb: harbor - harbored- harbored

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could harbor
you could harbor
she could harbor
we could harbor
you could harbor
they could harbor 	I could be harboring
you could be harboring
she could be harboring
we could be harboring
you could be harboring
they could be harboring	I could have harbored
you could have harbored
she could have harbored
we could have harbored
you could have harbored
they could have harbored	I could have been harboring
you could have been harboring
she could have been harboring
we could have been harboring
you could have been harboring
they could have been harboring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not harbor
you could not harbor
she could not harbor
we could not harbor
you could not harbor
they could not harbor 	I could not be harboring
you could not be harboring
she could not be harboring
we could not be harboring
you could not be harboring
they could not be harboring	I could not have harbored
you could not have harbored
she could not have harbored
we could not have harbored
you could not have harbored
they could not have harbored	I could not have been harboring
you could not have been harboring
she could not have been harboring
we could not have been harboring
you could not have been harboring
they could not have been harboring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I harbor?
could you harbor?
could she harbor?
could we harbor?
could you harbor?
could they harbor? 	could I be harboring?
could you be harboring?
could she be harboring?
could we be harboring?
could you be harboring?
could they be harboring? 	could I have harbored?
could you have harbored?
could she have harbored?
could we have harbored?
could you have harbored?
could they have harbored? 	could I have been harboring?
could you have been harboring?
could she have been harboring?
could we have been harboring?
could you have been harboring?
could they have been harboring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not harbor?
could you not harbor?
could she not harbor?
could we not harbor?
could you not harbor?
could they not harbor? 	could I not be harboring?
could you not be harboring?
could she not be harboring?
could we not be harboring?
could you not be harboring?
could they not be harboring? 	could I not have harbored?
could you not have harbored?
could she not have harbored?
could we not have harbored?
could you not have harbored?
could they not have harbored? 	could I not have been harboring?
could you not have been harboring?
could she not have been harboring?
could we not have been harboring?
could you not have been harboring?
could they not have been harboring?