English verb conjugation
COULD MAJOR

Regular verb: major - majored - majored

Affirmation

Simple form	V-ing form
I could major you could major he could major we could major you could major they could major	I could be majoring you could be majoring he could be majoring we could be majoring you could be majoring they could be majoring
Perfect	V-ing perfect
I could have majored you could have majored he could have majored we could have majored you could have majored they could have majored	I could have been majoring you could have been majoring he could have been majoring we could have been majoring you could have been majoring they could have been majoring

Negation

Simple form	V-ing form
I could not major you could not major he could not major we could not major you could not major they could not major	I could not be majoring you could not be majoring he could not be majoring we could not be majoring you could not be majoring they could not be majoring
Perfect	V-ing perfect
I could not have majored you could not have majored he could not have majored we could not have majored you could not have majored they could not have majored	I could not have been majoring you could not have been majoring he could not have been majoring we could not have been majoring you could not have been majoring they could not have been majoring

Interrogative form

Simple form	V-ing form
could I major? could you major? could he major? could we major? could you major? could they major?	could I be majoring? could you be majoring? could he be majoring? could we be majoring? could you be majoring? could they be majoring?
Perfect	V-ing perfect
could I have majored? could you have majored? could he have majored? could we have majored? could you have majored? could they have majored?	could I have been majoring? could you have been majoring? could he have been majoring? could we have been majoring? could you have been majoring? could they have been majoring?

Interro-negative form

Simple form	V-ing form
could I not major? could you not major? could he not major? could we not major? could you not major? could they not major?	could I not be majoring? could you not be majoring? could he not be majoring? could we not be majoring? could you not be majoring? could they not be majoring?
Perfect	V-ing perfect
could I not have majored? could you not have majored? could he not have majored? could we not have majored? could you not have majored? could they not have majored?	could I not have been majoring? could you not have been majoring? could he not have been majoring? could we not have been majoring? could you not have been majoring? could they not have been majoring?