English verb conjugation
COULD OFFER

Regular verb: offer - offered - offered

Affirmation

Simple form	V-ing form
I could offer you could offer he could offer we could offer you could offer they could offer	I could be offering you could be offering he could be offering we could be offering you could be offering they could be offering
Perfect	V-ing perfect
I could have offered you could have offered he could have offered we could have offered you could have offered they could have offered	I could have been offering you could have been offering he could have been offering we could have been offering you could have been offering they could have been offering

Negation

Simple form	V-ing form
I could not offer you could not offer he could not offer we could not offer you could not offer they could not offer	I could not be offering you could not be offering he could not be offering we could not be offering you could not be offering they could not be offering
Perfect	V-ing perfect
I could not have offered you could not have offered he could not have offered we could not have offered you could not have offered they could not have offered	I could not have been offering you could not have been offering he could not have been offering we could not have been offering you could not have been offering they could not have been offering

Interrogative form

Simple form	V-ing form
could I offer? could you offer? could he offer? could we offer? could you offer? could they offer?	could I be offering? could you be offering? could he be offering? could we be offering? could you be offering? could they be offering?
Perfect	V-ing perfect
could I have offered? could you have offered? could he have offered? could we have offered? could you have offered? could they have offered?	could I have been offering? could you have been offering? could he have been offering? could we have been offering? could you have been offering? could they have been offering?

Interro-negative form

Simple form	V-ing form
could I not offer? could you not offer? could he not offer? could we not offer? could you not offer? could they not offer?	could I not be offering? could you not be offering? could he not be offering? could we not be offering? could you not be offering? could they not be offering?
Perfect	V-ing perfect
could I not have offered? could you not have offered? could he not have offered? could we not have offered? could you not have offered? could they not have offered?	could I not have been offering? could you not have been offering? could he not have been offering? could we not have been offering? could you not have been offering? could they not have been offering?