I could cash you could cash he could cash we could cash you could cash they could cash
V-ing form
I could be cashing you could be cashing he could be cashing we could be cashing you could be cashing they could be cashing
Perfect
I could have cashed you could have cashed he could have cashed we could have cashed you could have cashed they could have cashed
V-ing perfect
I could have been cashing you could have been cashing he could have been cashing we could have been cashing you could have been cashing they could have been cashing
Negation
Simple form
I could not cash you could not cash he could not cash we could not cash you could not cash they could not cash
V-ing form
I could not be cashing you could not be cashing he could not be cashing we could not be cashing you could not be cashing they could not be cashing
Perfect
I could not have cashed you could not have cashed he could not have cashed we could not have cashed you could not have cashed they could not have cashed
V-ing perfect
I could not have been cashing you could not have been cashing he could not have been cashing we could not have been cashing you could not have been cashing they could not have been cashing
Interrogative form
Simple form
could I cash? could you cash? could he cash? could we cash? could you cash? could they cash?
V-ing form
could I be cashing? could you be cashing? could he be cashing? could we be cashing? could you be cashing? could they be cashing?
Perfect
could I have cashed? could you have cashed? could he have cashed? could we have cashed? could you have cashed? could they have cashed?
V-ing perfect
could I have been cashing? could you have been cashing? could he have been cashing? could we have been cashing? could you have been cashing? could they have been cashing?
Interro-negative form
Simple form
could I not cash? could you not cash? could he not cash? could we not cash? could you not cash? could they not cash?
V-ing form
could I not be cashing? could you not be cashing? could he not be cashing? could we not be cashing? could you not be cashing? could they not be cashing?
Perfect
could I not have cashed? could you not have cashed? could he not have cashed? could we not have cashed? could you not have cashed? could they not have cashed?
V-ing perfect
could I not have been cashing? could you not have been cashing? could he not have been cashing? could we not have been cashing? could you not have been cashing? could they not have been cashing?