English verb conjugation
COULD LEATHER

Regular verb: leather - leathered - leathered

Affirmation

Simple form	V-ing form
I could leather you could leather he could leather we could leather you could leather they could leather	I could be leathering you could be leathering he could be leathering we could be leathering you could be leathering they could be leathering
Perfect	V-ing perfect
I could have leathered you could have leathered he could have leathered we could have leathered you could have leathered they could have leathered	I could have been leathering you could have been leathering he could have been leathering we could have been leathering you could have been leathering they could have been leathering

Negation

Simple form	V-ing form
I couldn't leather you couldn't leather he couldn't leather we couldn't leather you couldn't leather they couldn't leather	I couldn't be leathering you couldn't be leathering he couldn't be leathering we couldn't be leathering you couldn't be leathering they couldn't be leathering
Perfect	V-ing perfect
I couldn't have leathered you couldn't have leathered he couldn't have leathered we couldn't have leathered you couldn't have leathered they couldn't have leathered	I couldn't have been leathering you couldn't have been leathering he couldn't have been leathering we couldn't have been leathering you couldn't have been leathering they couldn't have been leathering

Interrogative form

Simple form	V-ing form
could I leather? could you leather? could he leather? could we leather? could you leather? could they leather?	could I be leathering? could you be leathering? could he be leathering? could we be leathering? could you be leathering? could they be leathering?
Perfect	V-ing perfect
could I have leathered? could you have leathered? could he have leathered? could we have leathered? could you have leathered? could they have leathered?	could I have been leathering? could you have been leathering? could he have been leathering? could we have been leathering? could you have been leathering? could they have been leathering?

Interro-negative form

Simple form	V-ing form
couldn't I leather? couldn't you leather? couldn't he leather? couldn't we leather? couldn't you leather? couldn't they leather?	couldn't I be leathering? couldn't you be leathering? couldn't he be leathering? couldn't we be leathering? couldn't you be leathering? couldn't they be leathering?
Perfect	V-ing perfect
couldn't I have leathered? couldn't you have leathered? couldn't he have leathered? couldn't we have leathered? couldn't you have leathered? couldn't they have leathered?	couldn't I have been leathering? couldn't you have been leathering? couldn't he have been leathering? couldn't we have been leathering? couldn't you have been leathering? couldn't they have been leathering?