English verb conjugation
COULD FEATHER

Regular verb: feather - feathered - feathered

Affirmation

Simple form	V-ing form
I could feather you could feather she could feather we could feather you could feather they could feather	I could be feathering you could be feathering she could be feathering we could be feathering you could be feathering they could be feathering
Perfect	V-ing perfect
I could have feathered you could have feathered she could have feathered we could have feathered you could have feathered they could have feathered	I could have been feathering you could have been feathering she could have been feathering we could have been feathering you could have been feathering they could have been feathering

Negation

Simple form	V-ing form
I could not feather you could not feather she could not feather we could not feather you could not feather they could not feather	I could not be feathering you could not be feathering she could not be feathering we could not be feathering you could not be feathering they could not be feathering
Perfect	V-ing perfect
I could not have feathered you could not have feathered she could not have feathered we could not have feathered you could not have feathered they could not have feathered	I could not have been feathering you could not have been feathering she could not have been feathering we could not have been feathering you could not have been feathering they could not have been feathering

Interrogative form

Simple form	V-ing form
could I feather? could you feather? could she feather? could we feather? could you feather? could they feather?	could I be feathering? could you be feathering? could she be feathering? could we be feathering? could you be feathering? could they be feathering?
Perfect	V-ing perfect
could I have feathered? could you have feathered? could she have feathered? could we have feathered? could you have feathered? could they have feathered?	could I have been feathering? could you have been feathering? could she have been feathering? could we have been feathering? could you have been feathering? could they have been feathering?

Interro-negative form

Simple form	V-ing form
could I not feather? could you not feather? could she not feather? could we not feather? could you not feather? could they not feather?	could I not be feathering? could you not be feathering? could she not be feathering? could we not be feathering? could you not be feathering? could they not be feathering?
Perfect	V-ing perfect
could I not have feathered? could you not have feathered? could she not have feathered? could we not have feathered? could you not have feathered? could they not have feathered?	could I not have been feathering? could you not have been feathering? could she not have been feathering? could we not have been feathering? could you not have been feathering? could they not have been feathering?