English verb conjugation
COULD FORGO

Regular verb: forgo - forgoed - forgoed

Affirmation

Simple form	V-ing form
I could forgo you could forgo she could forgo we could forgo you could forgo they could forgo	I could be forgoing you could be forgoing she 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 she 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 she 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 couldn't forgo you couldn't forgo she couldn't forgo we couldn't forgo you couldn't forgo they couldn't forgo	I couldn't be forgoing you couldn't be forgoing she couldn't be forgoing we couldn't be forgoing you couldn't be forgoing they couldn't be forgoing
Perfect	V-ing perfect
I couldn't have forgoed you couldn't have forgoed she couldn't have forgoed we couldn't have forgoed you couldn't have forgoed they couldn't have forgoed	I couldn't have been forgoing you couldn't have been forgoing she couldn't have been forgoing we couldn't have been forgoing you couldn't have been forgoing they couldn't have been forgoing

Interrogative form

Simple form	V-ing form
could I forgo? could you forgo? could she forgo? could we forgo? could you forgo? could they forgo?	could I be forgoing? could you be forgoing? could she 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 she 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 she 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
couldn't I forgo? couldn't you forgo? couldn't she forgo? couldn't we forgo? couldn't you forgo? couldn't they forgo?	couldn't I be forgoing? couldn't you be forgoing? couldn't she be forgoing? couldn't we be forgoing? couldn't you be forgoing? couldn't they be forgoing?
Perfect	V-ing perfect
couldn't I have forgoed? couldn't you have forgoed? couldn't she have forgoed? couldn't we have forgoed? couldn't you have forgoed? couldn't they have forgoed?	couldn't I have been forgoing? couldn't you have been forgoing? couldn't she have been forgoing? couldn't we have been forgoing? couldn't you have been forgoing? couldn't they have been forgoing?