English verb conjugation
CAN LEATHER

Regular verb: leather - leathered - leathered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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