English verb conjugation
COULD LABOR

Regular verb: labor - labored - labored

Affirmation

Simple form	V-ing form
I could labor you could labor he could labor we could labor you could labor they could labor	I could be laboring you could be laboring he could be laboring we could be laboring you could be laboring they could be laboring
Perfect	V-ing perfect
I could have labored you could have labored he could have labored we could have labored you could have labored they could have labored	I could have been laboring you could have been laboring he could have been laboring we could have been laboring you could have been laboring they could have been laboring

Negation

Simple form	V-ing form
I could not labor you could not labor he could not labor we could not labor you could not labor they could not labor	I could not be laboring you could not be laboring he could not be laboring we could not be laboring you could not be laboring they could not be laboring
Perfect	V-ing perfect
I could not have labored you could not have labored he could not have labored we could not have labored you could not have labored they could not have labored	I could not have been laboring you could not have been laboring he could not have been laboring we could not have been laboring you could not have been laboring they could not have been laboring

Interrogative form

Simple form	V-ing form
could I labor? could you labor? could he labor? could we labor? could you labor? could they labor?	could I be laboring? could you be laboring? could he be laboring? could we be laboring? could you be laboring? could they be laboring?
Perfect	V-ing perfect
could I have labored? could you have labored? could he have labored? could we have labored? could you have labored? could they have labored?	could I have been laboring? could you have been laboring? could he have been laboring? could we have been laboring? could you have been laboring? could they have been laboring?

Interro-negative form

Simple form	V-ing form
could I not labor? could you not labor? could he not labor? could we not labor? could you not labor? could they not labor?	could I not be laboring? could you not be laboring? could he not be laboring? could we not be laboring? could you not be laboring? could they not be laboring?
Perfect	V-ing perfect
could I not have labored? could you not have labored? could he not have labored? could we not have labored? could you not have labored? could they not have labored?	could I not have been laboring? could you not have been laboring? could he not have been laboring? could we not have been laboring? could you not have been laboring? could they not have been laboring?