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 couldn't shower you couldn't shower he couldn't shower we couldn't shower you couldn't shower they couldn't shower	I couldn't be showering you couldn't be showering he couldn't be showering we couldn't be showering you couldn't be showering they couldn't be showering
Perfect	V-ing perfect
I couldn't have showered you couldn't have showered he couldn't have showered we couldn't have showered you couldn't have showered they couldn't have showered	I couldn't have been showering you couldn't have been showering he couldn't have been showering we couldn't have been showering you couldn't have been showering they couldn't 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
couldn't I shower? couldn't you shower? couldn't he shower? couldn't we shower? couldn't you shower? couldn't they shower?	couldn't I be showering? couldn't you be showering? couldn't he be showering? couldn't we be showering? couldn't you be showering? couldn't they be showering?
Perfect	V-ing perfect
couldn't I have showered? couldn't you have showered? couldn't he have showered? couldn't we have showered? couldn't you have showered? couldn't they have showered?	couldn't I have been showering? couldn't you have been showering? couldn't he have been showering? couldn't we have been showering? couldn't you have been showering? couldn't they have been showering?