English verb conjugation
CAN PAPER

Regular verb: paper - papered - papered

Affirmation

Simple form	V-ing form
I can paper you can paper he can paper we can paper you can paper they can paper	I can be papering you can be papering he can be papering we can be papering you can be papering they can be papering
Perfect	V-ing perfect
I can have papered you can have papered he can have papered we can have papered you can have papered they can have papered	I can have been papering you can have been papering he can have been papering we can have been papering you can have been papering they can have been papering

Negation

Simple form	V-ing form
I can't paper you can't paper he can't paper we can't paper you can't paper they can't paper	I can't be papering you can't be papering he can't be papering we can't be papering you can't be papering they can't be papering
Perfect	V-ing perfect
I can't have papered you can't have papered he can't have papered we can't have papered you can't have papered they can't have papered	I can't have been papering you can't have been papering he can't have been papering we can't have been papering you can't have been papering they can't have been papering

Interrogative form

Simple form	V-ing form
can I paper? can you paper? can he paper? can we paper? can you paper? can they paper?	can I be papering? can you be papering? can he be papering? can we be papering? can you be papering? can they be papering?
Perfect	V-ing perfect
can I have papered? can you have papered? can he have papered? can we have papered? can you have papered? can they have papered?	can I have been papering? can you have been papering? can he have been papering? can we have been papering? can you have been papering? can they have been papering?

Interro-negative form

Simple form	V-ing form
can't I paper? can't you paper? can't he paper? can't we paper? can't you paper? can't they paper?	can't I be papering? can't you be papering? can't he be papering? can't we be papering? can't you be papering? can't they be papering?
Perfect	V-ing perfect
can't I have papered? can't you have papered? can't he have papered? can't we have papered? can't you have papered? can't they have papered?	can't I have been papering? can't you have been papering? can't he have been papering? can't we have been papering? can't you have been papering? can't they have been papering?