English verb conjugation
COULD OVERLABOR

Regular verb: overlabor - overlabored - overlabored

Affirmation

Simple form	V-ing form
I could overlabor you could overlabor she could overlabor we could overlabor you could overlabor they could overlabor	I could be overlaboring you could be overlaboring she 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 she 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 she 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 she 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 she 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 she 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 she 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 she overlabor? could we overlabor? could you overlabor? could they overlabor?	could I be overlaboring? could you be overlaboring? could she 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 she 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 she 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 she 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 she 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 she 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 she have been overlaboring? couldn't we have been overlaboring? couldn't you have been overlaboring? couldn't they have been overlaboring?