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 couldn't major you couldn't major he couldn't major we couldn't major you couldn't major they couldn't major	I couldn't be majoring you couldn't be majoring he couldn't be majoring we couldn't be majoring you couldn't be majoring they couldn't be majoring
Perfect	V-ing perfect
I couldn't have majored you couldn't have majored he couldn't have majored we couldn't have majored you couldn't have majored they couldn't have majored	I couldn't have been majoring you couldn't have been majoring he couldn't have been majoring we couldn't have been majoring you couldn't have been majoring they couldn't 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
couldn't I major? couldn't you major? couldn't he major? couldn't we major? couldn't you major? couldn't they major?	couldn't I be majoring? couldn't you be majoring? couldn't he be majoring? couldn't we be majoring? couldn't you be majoring? couldn't they be majoring?
Perfect	V-ing perfect
couldn't I have majored? couldn't you have majored? couldn't he have majored? couldn't we have majored? couldn't you have majored? couldn't they have majored?	couldn't I have been majoring? couldn't you have been majoring? couldn't he have been majoring? couldn't we have been majoring? couldn't you have been majoring? couldn't they have been majoring?