I can power you can power he can power we can power you can power they can power
V-ing form
I can be powering you can be powering he can be powering we can be powering you can be powering they can be powering
Perfect
I can have powered you can have powered he can have powered we can have powered you can have powered they can have powered
V-ing perfect
I can have been powering you can have been powering he can have been powering we can have been powering you can have been powering they can have been powering
Negation
Simple form
I can't power you can't power he can't power we can't power you can't power they can't power
V-ing form
I can't be powering you can't be powering he can't be powering we can't be powering you can't be powering they can't be powering
Perfect
I can't have powered you can't have powered he can't have powered we can't have powered you can't have powered they can't have powered
V-ing perfect
I can't have been powering you can't have been powering he can't have been powering we can't have been powering you can't have been powering they can't have been powering
Interrogative form
Simple form
can I power? can you power? can he power? can we power? can you power? can they power?
V-ing form
can I be powering? can you be powering? can he be powering? can we be powering? can you be powering? can they be powering?
Perfect
can I have powered? can you have powered? can he have powered? can we have powered? can you have powered? can they have powered?
V-ing perfect
can I have been powering? can you have been powering? can he have been powering? can we have been powering? can you have been powering? can they have been powering?
Interro-negative form
Simple form
can't I power? can't you power? can't he power? can't we power? can't you power? can't they power?
V-ing form
can't I be powering? can't you be powering? can't he be powering? can't we be powering? can't you be powering? can't they be powering?
Perfect
can't I have powered? can't you have powered? can't he have powered? can't we have powered? can't you have powered? can't they have powered?
V-ing perfect
can't I have been powering? can't you have been powering? can't he have been powering? can't we have been powering? can't you have been powering? can't they have been powering?