English verb conjugation
COULD OVERLABOR

Regular verb: overlabor - overlabored - overlabored

Affirmation

Simple form	V-ing form
I could overlabor you could overlabor he could overlabor we could overlabor you could overlabor they could overlabor	I could be overlaboring you could be overlaboring he could be overlaboring we could be overlaboring you could be overlaboring they could be overlaboring
Perfect	V-ing perfect
I could have overlabored you could have overlabored he could have overlabored we could have overlabored you could have overlabored they could have overlabored	I could have been overlaboring you could have been overlaboring he could have been overlaboring we could have been overlaboring you could have been overlaboring they could have been overlaboring

Negation

Simple form	V-ing form
I couldn't overlabor you couldn't overlabor he couldn't overlabor we couldn't overlabor you couldn't overlabor they couldn't overlabor	I couldn't be overlaboring you couldn't be overlaboring he couldn't be overlaboring we couldn't be overlaboring you couldn't be overlaboring they couldn't be overlaboring
Perfect	V-ing perfect
I couldn't have overlabored you couldn't have overlabored he couldn't have overlabored we couldn't have overlabored you couldn't have overlabored they couldn't have overlabored	I couldn't have been overlaboring you couldn't have been overlaboring he couldn't have been overlaboring we couldn't have been overlaboring you couldn't have been overlaboring they couldn't have been overlaboring

Interrogative form

Simple form	V-ing form
could I overlabor? could you overlabor? could he overlabor? could we overlabor? could you overlabor? could they overlabor?	could I be overlaboring? could you be overlaboring? could he be overlaboring? could we be overlaboring? could you be overlaboring? could they be overlaboring?
Perfect	V-ing perfect
could I have overlabored? could you have overlabored? could he have overlabored? could we have overlabored? could you have overlabored? could they have overlabored?	could I have been overlaboring? could you have been overlaboring? could he have been overlaboring? could we have been overlaboring? could you have been overlaboring? could they have been overlaboring?

Interro-negative form

Simple form	V-ing form
couldn't I overlabor? couldn't you overlabor? couldn't he overlabor? couldn't we overlabor? couldn't you overlabor? couldn't they overlabor?	couldn't I be overlaboring? couldn't you be overlaboring? couldn't he be overlaboring? couldn't we be overlaboring? couldn't you be overlaboring? couldn't they be overlaboring?
Perfect	V-ing perfect
couldn't I have overlabored? couldn't you have overlabored? couldn't he have overlabored? couldn't we have overlabored? couldn't you have overlabored? couldn't they have overlabored?	couldn't I have been overlaboring? couldn't you have been overlaboring? couldn't he have been overlaboring? couldn't we have been overlaboring? couldn't you have been overlaboring? couldn't they have been overlaboring?