I could featheredge you could featheredge he could featheredge we could featheredge you could featheredge they could featheredge
V-ing form
I could be featheredging you could be featheredging he could be featheredging we could be featheredging you could be featheredging they could be featheredging
Perfect
I could have featheredged you could have featheredged he could have featheredged we could have featheredged you could have featheredged they could have featheredged
V-ing perfect
I could have been featheredging you could have been featheredging he could have been featheredging we could have been featheredging you could have been featheredging they could have been featheredging
Negation
Simple form
I could not featheredge you could not featheredge he could not featheredge we could not featheredge you could not featheredge they could not featheredge
V-ing form
I could not be featheredging you could not be featheredging he could not be featheredging we could not be featheredging you could not be featheredging they could not be featheredging
Perfect
I could not have featheredged you could not have featheredged he could not have featheredged we could not have featheredged you could not have featheredged they could not have featheredged
V-ing perfect
I could not have been featheredging you could not have been featheredging he could not have been featheredging we could not have been featheredging you could not have been featheredging they could not have been featheredging
Interrogative form
Simple form
could I featheredge? could you featheredge? could he featheredge? could we featheredge? could you featheredge? could they featheredge?
V-ing form
could I be featheredging? could you be featheredging? could he be featheredging? could we be featheredging? could you be featheredging? could they be featheredging?
Perfect
could I have featheredged? could you have featheredged? could he have featheredged? could we have featheredged? could you have featheredged? could they have featheredged?
V-ing perfect
could I have been featheredging? could you have been featheredging? could he have been featheredging? could we have been featheredging? could you have been featheredging? could they have been featheredging?
Interro-negative form
Simple form
could I not featheredge? could you not featheredge? could he not featheredge? could we not featheredge? could you not featheredge? could they not featheredge?
V-ing form
could I not be featheredging? could you not be featheredging? could he not be featheredging? could we not be featheredging? could you not be featheredging? could they not be featheredging?
Perfect
could I not have featheredged? could you not have featheredged? could he not have featheredged? could we not have featheredged? could you not have featheredged? could they not have featheredged?
V-ing perfect
could I not have been featheredging? could you not have been featheredging? could he not have been featheredging? could we not have been featheredging? could you not have been featheredging? could they not have been featheredging?