English verb conjugation
COULD PROFFER

Regular verb: proffer - proffered - proffered

Affirmation

Simple form	V-ing form
I could proffer you could proffer she could proffer we could proffer you could proffer they could proffer	I could be proffering you could be proffering she could be proffering we could be proffering you could be proffering they could be proffering
Perfect	V-ing perfect
I could have proffered you could have proffered she could have proffered we could have proffered you could have proffered they could have proffered	I could have been proffering you could have been proffering she could have been proffering we could have been proffering you could have been proffering they could have been proffering

Negation

Simple form	V-ing form
I could not proffer you could not proffer she could not proffer we could not proffer you could not proffer they could not proffer	I could not be proffering you could not be proffering she could not be proffering we could not be proffering you could not be proffering they could not be proffering
Perfect	V-ing perfect
I could not have proffered you could not have proffered she could not have proffered we could not have proffered you could not have proffered they could not have proffered	I could not have been proffering you could not have been proffering she could not have been proffering we could not have been proffering you could not have been proffering they could not have been proffering

Interrogative form

Simple form	V-ing form
could I proffer? could you proffer? could she proffer? could we proffer? could you proffer? could they proffer?	could I be proffering? could you be proffering? could she be proffering? could we be proffering? could you be proffering? could they be proffering?
Perfect	V-ing perfect
could I have proffered? could you have proffered? could she have proffered? could we have proffered? could you have proffered? could they have proffered?	could I have been proffering? could you have been proffering? could she have been proffering? could we have been proffering? could you have been proffering? could they have been proffering?

Interro-negative form

Simple form	V-ing form
could I not proffer? could you not proffer? could she not proffer? could we not proffer? could you not proffer? could they not proffer?	could I not be proffering? could you not be proffering? could she not be proffering? could we not be proffering? could you not be proffering? could they not be proffering?
Perfect	V-ing perfect
could I not have proffered? could you not have proffered? could she not have proffered? could we not have proffered? could you not have proffered? could they not have proffered?	could I not have been proffering? could you not have been proffering? could she not have been proffering? could we not have been proffering? could you not have been proffering? could they not have been proffering?