English verb conjugation
COULD PROMISE

Regular verb: promise - promised - promised

Affirmation

Simple form	V-ing form
I could promise you could promise she could promise we could promise you could promise they could promise	I could be promising you could be promising she could be promising we could be promising you could be promising they could be promising
Perfect	V-ing perfect
I could have promised you could have promised she could have promised we could have promised you could have promised they could have promised	I could have been promising you could have been promising she could have been promising we could have been promising you could have been promising they could have been promising

Negation

Simple form	V-ing form
I could not promise you could not promise she could not promise we could not promise you could not promise they could not promise	I could not be promising you could not be promising she could not be promising we could not be promising you could not be promising they could not be promising
Perfect	V-ing perfect
I could not have promised you could not have promised she could not have promised we could not have promised you could not have promised they could not have promised	I could not have been promising you could not have been promising she could not have been promising we could not have been promising you could not have been promising they could not have been promising

Interrogative form

Simple form	V-ing form
could I promise? could you promise? could she promise? could we promise? could you promise? could they promise?	could I be promising? could you be promising? could she be promising? could we be promising? could you be promising? could they be promising?
Perfect	V-ing perfect
could I have promised? could you have promised? could she have promised? could we have promised? could you have promised? could they have promised?	could I have been promising? could you have been promising? could she have been promising? could we have been promising? could you have been promising? could they have been promising?

Interro-negative form

Simple form	V-ing form
could I not promise? could you not promise? could she not promise? could we not promise? could you not promise? could they not promise?	could I not be promising? could you not be promising? could she not be promising? could we not be promising? could you not be promising? could they not be promising?
Perfect	V-ing perfect
could I not have promised? could you not have promised? could she not have promised? could we not have promised? could you not have promised? could they not have promised?	could I not have been promising? could you not have been promising? could she not have been promising? could we not have been promising? could you not have been promising? could they not have been promising?