English verb conjugation
COULD HARBOR

Regular verb: harbor - harbored - harbored

Affirmation

Simple form	V-ing form
I could harbor you could harbor he could harbor we could harbor you could harbor they could harbor	I could be harboring you could be harboring he could be harboring we could be harboring you could be harboring they could be harboring
Perfect	V-ing perfect
I could have harbored you could have harbored he 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 he 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
I couldn't harbor you couldn't harbor he couldn't harbor we couldn't harbor you couldn't harbor they couldn't harbor	I couldn't be harboring you couldn't be harboring he couldn't be harboring we couldn't be harboring you couldn't be harboring they couldn't be harboring
Perfect	V-ing perfect
I couldn't have harbored you couldn't have harbored he couldn't have harbored we couldn't have harbored you couldn't have harbored they couldn't have harbored	I couldn't have been harboring you couldn't have been harboring he couldn't have been harboring we couldn't have been harboring you couldn't have been harboring they couldn't have been harboring

Interrogative form

Simple form	V-ing form
could I harbor? could you harbor? could he harbor? could we harbor? could you harbor? could they harbor?	could I be harboring? could you be harboring? could he be harboring? could we be harboring? could you be harboring? could they be harboring?
Perfect	V-ing perfect
could I have harbored? could you have harbored? could he 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 he 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
couldn't I harbor? couldn't you harbor? couldn't he harbor? couldn't we harbor? couldn't you harbor? couldn't they harbor?	couldn't I be harboring? couldn't you be harboring? couldn't he be harboring? couldn't we be harboring? couldn't you be harboring? couldn't they be harboring?
Perfect	V-ing perfect
couldn't I have harbored? couldn't you have harbored? couldn't he have harbored? couldn't we have harbored? couldn't you have harbored? couldn't they have harbored?	couldn't I have been harboring? couldn't you have been harboring? couldn't he have been harboring? couldn't we have been harboring? couldn't you have been harboring? couldn't they have been harboring?