English verb conjugation
COULD FORGO

Regular verb: forgo - forgoed - forgoed

Affirmation

Simple form	V-ing form
I could forgo you could forgo he could forgo we could forgo you could forgo they could forgo	I could be forgoing you could be forgoing he could be forgoing we could be forgoing you could be forgoing they could be forgoing
Perfect	V-ing perfect
I could have forgoed you could have forgoed he could have forgoed we could have forgoed you could have forgoed they could have forgoed	I could have been forgoing you could have been forgoing he could have been forgoing we could have been forgoing you could have been forgoing they could have been forgoing

Negation

Simple form	V-ing form
I could not forgo you could not forgo he could not forgo we could not forgo you could not forgo they could not forgo	I could not be forgoing you could not be forgoing he could not be forgoing we could not be forgoing you could not be forgoing they could not be forgoing
Perfect	V-ing perfect
I could not have forgoed you could not have forgoed he could not have forgoed we could not have forgoed you could not have forgoed they could not have forgoed	I could not have been forgoing you could not have been forgoing he could not have been forgoing we could not have been forgoing you could not have been forgoing they could not have been forgoing

Interrogative form

Simple form	V-ing form
could I forgo? could you forgo? could he forgo? could we forgo? could you forgo? could they forgo?	could I be forgoing? could you be forgoing? could he be forgoing? could we be forgoing? could you be forgoing? could they be forgoing?
Perfect	V-ing perfect
could I have forgoed? could you have forgoed? could he have forgoed? could we have forgoed? could you have forgoed? could they have forgoed?	could I have been forgoing? could you have been forgoing? could he have been forgoing? could we have been forgoing? could you have been forgoing? could they have been forgoing?

Interro-negative form

Simple form	V-ing form
could I not forgo? could you not forgo? could he not forgo? could we not forgo? could you not forgo? could they not forgo?	could I not be forgoing? could you not be forgoing? could he not be forgoing? could we not be forgoing? could you not be forgoing? could they not be forgoing?
Perfect	V-ing perfect
could I not have forgoed? could you not have forgoed? could he not have forgoed? could we not have forgoed? could you not have forgoed? could they not have forgoed?	could I not have been forgoing? could you not have been forgoing? could he not have been forgoing? could we not have been forgoing? could you not have been forgoing? could they not have been forgoing?