I could anguish you could anguish he could anguish we could anguish you could anguish they could anguish
V-ing form
I could be anguishing you could be anguishing he could be anguishing we could be anguishing you could be anguishing they could be anguishing
Perfect
I could have anguished you could have anguished he could have anguished we could have anguished you could have anguished they could have anguished
V-ing perfect
I could have been anguishing you could have been anguishing he could have been anguishing we could have been anguishing you could have been anguishing they could have been anguishing
Negation
Simple form
I could not anguish you could not anguish he could not anguish we could not anguish you could not anguish they could not anguish
V-ing form
I could not be anguishing you could not be anguishing he could not be anguishing we could not be anguishing you could not be anguishing they could not be anguishing
Perfect
I could not have anguished you could not have anguished he could not have anguished we could not have anguished you could not have anguished they could not have anguished
V-ing perfect
I could not have been anguishing you could not have been anguishing he could not have been anguishing we could not have been anguishing you could not have been anguishing they could not have been anguishing
Interrogative form
Simple form
could I anguish? could you anguish? could he anguish? could we anguish? could you anguish? could they anguish?
V-ing form
could I be anguishing? could you be anguishing? could he be anguishing? could we be anguishing? could you be anguishing? could they be anguishing?
Perfect
could I have anguished? could you have anguished? could he have anguished? could we have anguished? could you have anguished? could they have anguished?
V-ing perfect
could I have been anguishing? could you have been anguishing? could he have been anguishing? could we have been anguishing? could you have been anguishing? could they have been anguishing?
Interro-negative form
Simple form
could I not anguish? could you not anguish? could he not anguish? could we not anguish? could you not anguish? could they not anguish?
V-ing form
could I not be anguishing? could you not be anguishing? could he not be anguishing? could we not be anguishing? could you not be anguishing? could they not be anguishing?
Perfect
could I not have anguished? could you not have anguished? could he not have anguished? could we not have anguished? could you not have anguished? could they not have anguished?
V-ing perfect
could I not have been anguishing? could you not have been anguishing? could he not have been anguishing? could we not have been anguishing? could you not have been anguishing? could they not have been anguishing?