English verb conjugation
COULD CHAMPION

Regular verb: champion - championed - championed

Affirmation

Simple form	V-ing form
I could champion you could champion he could champion we could champion you could champion they could champion	I could be championing you could be championing he could be championing we could be championing you could be championing they could be championing
Perfect	V-ing perfect
I could have championed you could have championed he could have championed we could have championed you could have championed they could have championed	I could have been championing you could have been championing he could have been championing we could have been championing you could have been championing they could have been championing

Negation

Simple form	V-ing form
I could not champion you could not champion he could not champion we could not champion you could not champion they could not champion	I could not be championing you could not be championing he could not be championing we could not be championing you could not be championing they could not be championing
Perfect	V-ing perfect
I could not have championed you could not have championed he could not have championed we could not have championed you could not have championed they could not have championed	I could not have been championing you could not have been championing he could not have been championing we could not have been championing you could not have been championing they could not have been championing

Interrogative form

Simple form	V-ing form
could I champion? could you champion? could he champion? could we champion? could you champion? could they champion?	could I be championing? could you be championing? could he be championing? could we be championing? could you be championing? could they be championing?
Perfect	V-ing perfect
could I have championed? could you have championed? could he have championed? could we have championed? could you have championed? could they have championed?	could I have been championing? could you have been championing? could he have been championing? could we have been championing? could you have been championing? could they have been championing?

Interro-negative form

Simple form	V-ing form
could I not champion? could you not champion? could he not champion? could we not champion? could you not champion? could they not champion?	could I not be championing? could you not be championing? could he not be championing? could we not be championing? could you not be championing? could they not be championing?
Perfect	V-ing perfect
could I not have championed? could you not have championed? could he not have championed? could we not have championed? could you not have championed? could they not have championed?	could I not have been championing? could you not have been championing? could he not have been championing? could we not have been championing? could you not have been championing? could they not have been championing?