English verb conjugation
COULD FEATHER

Regular verb: feather - feathered - feathered

Affirmation

Simple form	V-ing form
I could feather you could feather he could feather we could feather you could feather they could feather	I could be feathering you could be feathering he 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 he 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 he 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 couldn't feather you couldn't feather he couldn't feather we couldn't feather you couldn't feather they couldn't feather	I couldn't be feathering you couldn't be feathering he couldn't be feathering we couldn't be feathering you couldn't be feathering they couldn't be feathering
Perfect	V-ing perfect
I couldn't have feathered you couldn't have feathered he couldn't have feathered we couldn't have feathered you couldn't have feathered they couldn't have feathered	I couldn't have been feathering you couldn't have been feathering he couldn't have been feathering we couldn't have been feathering you couldn't have been feathering they couldn't have been feathering

Interrogative form

Simple form	V-ing form
could I feather? could you feather? could he feather? could we feather? could you feather? could they feather?	could I be feathering? could you be feathering? could he 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 he 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 he 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
couldn't I feather? couldn't you feather? couldn't he feather? couldn't we feather? couldn't you feather? couldn't they feather?	couldn't I be feathering? couldn't you be feathering? couldn't he be feathering? couldn't we be feathering? couldn't you be feathering? couldn't they be feathering?
Perfect	V-ing perfect
couldn't I have feathered? couldn't you have feathered? couldn't he have feathered? couldn't we have feathered? couldn't you have feathered? couldn't they have feathered?	couldn't I have been feathering? couldn't you have been feathering? couldn't he have been feathering? couldn't we have been feathering? couldn't you have been feathering? couldn't they have been feathering?