I can shower you can shower she can shower we can shower you can shower they can shower
V-ing form
I can be showering you can be showering she can be showering we can be showering you can be showering they can be showering
Perfect
I can have showered you can have showered she can have showered we can have showered you can have showered they can have showered
V-ing perfect
I can have been showering you can have been showering she can have been showering we can have been showering you can have been showering they can have been showering
Negation
Simple form
I can't shower you can't shower she can't shower we can't shower you can't shower they can't shower
V-ing form
I can't be showering you can't be showering she can't be showering we can't be showering you can't be showering they can't be showering
Perfect
I can't have showered you can't have showered she can't have showered we can't have showered you can't have showered they can't have showered
V-ing perfect
I can't have been showering you can't have been showering she can't have been showering we can't have been showering you can't have been showering they can't have been showering
Interrogative form
Simple form
can I shower? can you shower? can she shower? can we shower? can you shower? can they shower?
V-ing form
can I be showering? can you be showering? can she be showering? can we be showering? can you be showering? can they be showering?
Perfect
can I have showered? can you have showered? can she have showered? can we have showered? can you have showered? can they have showered?
V-ing perfect
can I have been showering? can you have been showering? can she have been showering? can we have been showering? can you have been showering? can they have been showering?
Interro-negative form
Simple form
can't I shower? can't you shower? can't she shower? can't we shower? can't you shower? can't they shower?
V-ing form
can't I be showering? can't you be showering? can't she be showering? can't we be showering? can't you be showering? can't they be showering?
Perfect
can't I have showered? can't you have showered? can't she have showered? can't we have showered? can't you have showered? can't they have showered?
V-ing perfect
can't I have been showering? can't you have been showering? can't she have been showering? can't we have been showering? can't you have been showering? can't they have been showering?