I could jail you could jail he could jail we could jail you could jail they could jail
V-ing form
I could be jailing you could be jailing he could be jailing we could be jailing you could be jailing they could be jailing
Perfect
I could have jailed you could have jailed he could have jailed we could have jailed you could have jailed they could have jailed
V-ing perfect
I could have been jailing you could have been jailing he could have been jailing we could have been jailing you could have been jailing they could have been jailing
Negation
Simple form
I could not jail you could not jail he could not jail we could not jail you could not jail they could not jail
V-ing form
I could not be jailing you could not be jailing he could not be jailing we could not be jailing you could not be jailing they could not be jailing
Perfect
I could not have jailed you could not have jailed he could not have jailed we could not have jailed you could not have jailed they could not have jailed
V-ing perfect
I could not have been jailing you could not have been jailing he could not have been jailing we could not have been jailing you could not have been jailing they could not have been jailing
Interrogative form
Simple form
could I jail? could you jail? could he jail? could we jail? could you jail? could they jail?
V-ing form
could I be jailing? could you be jailing? could he be jailing? could we be jailing? could you be jailing? could they be jailing?
Perfect
could I have jailed? could you have jailed? could he have jailed? could we have jailed? could you have jailed? could they have jailed?
V-ing perfect
could I have been jailing? could you have been jailing? could he have been jailing? could we have been jailing? could you have been jailing? could they have been jailing?
Interro-negative form
Simple form
could I not jail? could you not jail? could he not jail? could we not jail? could you not jail? could they not jail?
V-ing form
could I not be jailing? could you not be jailing? could he not be jailing? could we not be jailing? could you not be jailing? could they not be jailing?
Perfect
could I not have jailed? could you not have jailed? could he not have jailed? could we not have jailed? could you not have jailed? could they not have jailed?
V-ing perfect
could I not have been jailing? could you not have been jailing? could he not have been jailing? could we not have been jailing? could you not have been jailing? could they not have been jailing?