English verb conjugation
COULD PROPOSITION

Regular verb: proposition - propositioned - propositioned

Affirmation

Simple form	V-ing form
I could proposition you could proposition he could proposition we could proposition you could proposition they could proposition	I could be propositioning you could be propositioning he could be propositioning we could be propositioning you could be propositioning they could be propositioning
Perfect	V-ing perfect
I could have propositioned you could have propositioned he could have propositioned we could have propositioned you could have propositioned they could have propositioned	I could have been propositioning you could have been propositioning he could have been propositioning we could have been propositioning you could have been propositioning they could have been propositioning

Negation

Simple form	V-ing form
I could not proposition you could not proposition he could not proposition we could not proposition you could not proposition they could not proposition	I could not be propositioning you could not be propositioning he could not be propositioning we could not be propositioning you could not be propositioning they could not be propositioning
Perfect	V-ing perfect
I could not have propositioned you could not have propositioned he could not have propositioned we could not have propositioned you could not have propositioned they could not have propositioned	I could not have been propositioning you could not have been propositioning he could not have been propositioning we could not have been propositioning you could not have been propositioning they could not have been propositioning

Interrogative form

Simple form	V-ing form
could I proposition? could you proposition? could he proposition? could we proposition? could you proposition? could they proposition?	could I be propositioning? could you be propositioning? could he be propositioning? could we be propositioning? could you be propositioning? could they be propositioning?
Perfect	V-ing perfect
could I have propositioned? could you have propositioned? could he have propositioned? could we have propositioned? could you have propositioned? could they have propositioned?	could I have been propositioning? could you have been propositioning? could he have been propositioning? could we have been propositioning? could you have been propositioning? could they have been propositioning?

Interro-negative form

Simple form	V-ing form
could I not proposition? could you not proposition? could he not proposition? could we not proposition? could you not proposition? could they not proposition?	could I not be propositioning? could you not be propositioning? could he not be propositioning? could we not be propositioning? could you not be propositioning? could they not be propositioning?
Perfect	V-ing perfect
could I not have propositioned? could you not have propositioned? could he not have propositioned? could we not have propositioned? could you not have propositioned? could they not have propositioned?	could I not have been propositioning? could you not have been propositioning? could he not have been propositioning? could we not have been propositioning? could you not have been propositioning? could they not have been propositioning?