I could job you could job he could job we could job you could job they could job
V-ing form
I could be jobbing you could be jobbing he could be jobbing we could be jobbing you could be jobbing they could be jobbing
Perfect
I could have jobbed you could have jobbed he could have jobbed we could have jobbed you could have jobbed they could have jobbed
V-ing perfect
I could have been jobbing you could have been jobbing he could have been jobbing we could have been jobbing you could have been jobbing they could have been jobbing
Negation
Simple form
I could not job you could not job he could not job we could not job you could not job they could not job
V-ing form
I could not be jobbing you could not be jobbing he could not be jobbing we could not be jobbing you could not be jobbing they could not be jobbing
Perfect
I could not have jobbed you could not have jobbed he could not have jobbed we could not have jobbed you could not have jobbed they could not have jobbed
V-ing perfect
I could not have been jobbing you could not have been jobbing he could not have been jobbing we could not have been jobbing you could not have been jobbing they could not have been jobbing
Interrogative form
Simple form
could I job? could you job? could he job? could we job? could you job? could they job?
V-ing form
could I be jobbing? could you be jobbing? could he be jobbing? could we be jobbing? could you be jobbing? could they be jobbing?
Perfect
could I have jobbed? could you have jobbed? could he have jobbed? could we have jobbed? could you have jobbed? could they have jobbed?
V-ing perfect
could I have been jobbing? could you have been jobbing? could he have been jobbing? could we have been jobbing? could you have been jobbing? could they have been jobbing?
Interro-negative form
Simple form
could I not job? could you not job? could he not job? could we not job? could you not job? could they not job?
V-ing form
could I not be jobbing? could you not be jobbing? could he not be jobbing? could we not be jobbing? could you not be jobbing? could they not be jobbing?
Perfect
could I not have jobbed? could you not have jobbed? could he not have jobbed? could we not have jobbed? could you not have jobbed? could they not have jobbed?
V-ing perfect
could I not have been jobbing? could you not have been jobbing? could he not have been jobbing? could we not have been jobbing? could you not have been jobbing? could they not have been jobbing?