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 couldn't featheredge you couldn't featheredge he couldn't featheredge we couldn't featheredge you couldn't featheredge they couldn't featheredge
V-ing form
I couldn't be featheredging you couldn't be featheredging he couldn't be featheredging we couldn't be featheredging you couldn't be featheredging they couldn't be featheredging
Perfect
I couldn't have featheredged you couldn't have featheredged he couldn't have featheredged we couldn't have featheredged you couldn't have featheredged they couldn't have featheredged
V-ing perfect
I couldn't have been featheredging you couldn't have been featheredging he couldn't have been featheredging we couldn't have been featheredging you couldn't have been featheredging they couldn't 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
couldn't I featheredge? couldn't you featheredge? couldn't he featheredge? couldn't we featheredge? couldn't you featheredge? couldn't they featheredge?
V-ing form
couldn't I be featheredging? couldn't you be featheredging? couldn't he be featheredging? couldn't we be featheredging? couldn't you be featheredging? couldn't they be featheredging?
Perfect
couldn't I have featheredged? couldn't you have featheredged? couldn't he have featheredged? couldn't we have featheredged? couldn't you have featheredged? couldn't they have featheredged?
V-ing perfect
couldn't I have been featheredging? couldn't you have been featheredging? couldn't he have been featheredging? couldn't we have been featheredging? couldn't you have been featheredging? couldn't they have been featheredging?