English verb conjugation
COULD SHOWER

Regular verb: shower - showered - showered

Affirmation

Simple form	V-ing form
I could shower you could shower he could shower we could shower you could shower they could shower	I could be showering you could be showering he could be showering we could be showering you could be showering they could be showering
Perfect	V-ing perfect
I could have showered you could have showered he could have showered we could have showered you could have showered they could have showered	I could have been showering you could have been showering he could have been showering we could have been showering you could have been showering they could have been showering

Negation

Simple form	V-ing form
I could not shower you could not shower he could not shower we could not shower you could not shower they could not shower	I could not be showering you could not be showering he could not be showering we could not be showering you could not be showering they could not be showering
Perfect	V-ing perfect
I could not have showered you could not have showered he could not have showered we could not have showered you could not have showered they could not have showered	I could not have been showering you could not have been showering he could not have been showering we could not have been showering you could not have been showering they could not have been showering

Interrogative form

Simple form	V-ing form
could I shower? could you shower? could he shower? could we shower? could you shower? could they shower?	could I be showering? could you be showering? could he be showering? could we be showering? could you be showering? could they be showering?
Perfect	V-ing perfect
could I have showered? could you have showered? could he have showered? could we have showered? could you have showered? could they have showered?	could I have been showering? could you have been showering? could he have been showering? could we have been showering? could you have been showering? could they have been showering?

Interro-negative form

Simple form	V-ing form
could I not shower? could you not shower? could he not shower? could we not shower? could you not shower? could they not shower?	could I not be showering? could you not be showering? could he not be showering? could we not be showering? could you not be showering? could they not be showering?
Perfect	V-ing perfect
could I not have showered? could you not have showered? could he not have showered? could we not have showered? could you not have showered? could they not have showered?	could I not have been showering? could you not have been showering? could he not have been showering? could we not have been showering? could you not have been showering? could they not have been showering?