English verb conjugation
COULD PREPARE

Regular verb: prepare - prepared - prepared

Affirmation

Simple form	V-ing form
I could prepare you could prepare he could prepare we could prepare you could prepare they could prepare	I could be preparing you could be preparing he could be preparing we could be preparing you could be preparing they could be preparing
Perfect	V-ing perfect
I could have prepared you could have prepared he could have prepared we could have prepared you could have prepared they could have prepared	I could have been preparing you could have been preparing he could have been preparing we could have been preparing you could have been preparing they could have been preparing

Negation

Simple form	V-ing form
I could not prepare you could not prepare he could not prepare we could not prepare you could not prepare they could not prepare	I could not be preparing you could not be preparing he could not be preparing we could not be preparing you could not be preparing they could not be preparing
Perfect	V-ing perfect
I could not have prepared you could not have prepared he could not have prepared we could not have prepared you could not have prepared they could not have prepared	I could not have been preparing you could not have been preparing he could not have been preparing we could not have been preparing you could not have been preparing they could not have been preparing

Interrogative form

Simple form	V-ing form
could I prepare? could you prepare? could he prepare? could we prepare? could you prepare? could they prepare?	could I be preparing? could you be preparing? could he be preparing? could we be preparing? could you be preparing? could they be preparing?
Perfect	V-ing perfect
could I have prepared? could you have prepared? could he have prepared? could we have prepared? could you have prepared? could they have prepared?	could I have been preparing? could you have been preparing? could he have been preparing? could we have been preparing? could you have been preparing? could they have been preparing?

Interro-negative form

Simple form	V-ing form
could I not prepare? could you not prepare? could he not prepare? could we not prepare? could you not prepare? could they not prepare?	could I not be preparing? could you not be preparing? could he not be preparing? could we not be preparing? could you not be preparing? could they not be preparing?
Perfect	V-ing perfect
could I not have prepared? could you not have prepared? could he not have prepared? could we not have prepared? could you not have prepared? could they not have prepared?	could I not have been preparing? could you not have been preparing? could he not have been preparing? could we not have been preparing? could you not have been preparing? could they not have been preparing?