I could exterminate you could exterminate he could exterminate we could exterminate you could exterminate they could exterminate
V-ing form
I could be exterminating you could be exterminating he could be exterminating we could be exterminating you could be exterminating they could be exterminating
Perfect
I could have exterminated you could have exterminated he could have exterminated we could have exterminated you could have exterminated they could have exterminated
V-ing perfect
I could have been exterminating you could have been exterminating he could have been exterminating we could have been exterminating you could have been exterminating they could have been exterminating
Negation
Simple form
I could not exterminate you could not exterminate he could not exterminate we could not exterminate you could not exterminate they could not exterminate
V-ing form
I could not be exterminating you could not be exterminating he could not be exterminating we could not be exterminating you could not be exterminating they could not be exterminating
Perfect
I could not have exterminated you could not have exterminated he could not have exterminated we could not have exterminated you could not have exterminated they could not have exterminated
V-ing perfect
I could not have been exterminating you could not have been exterminating he could not have been exterminating we could not have been exterminating you could not have been exterminating they could not have been exterminating
Interrogative form
Simple form
could I exterminate? could you exterminate? could he exterminate? could we exterminate? could you exterminate? could they exterminate?
V-ing form
could I be exterminating? could you be exterminating? could he be exterminating? could we be exterminating? could you be exterminating? could they be exterminating?
Perfect
could I have exterminated? could you have exterminated? could he have exterminated? could we have exterminated? could you have exterminated? could they have exterminated?
V-ing perfect
could I have been exterminating? could you have been exterminating? could he have been exterminating? could we have been exterminating? could you have been exterminating? could they have been exterminating?
Interro-negative form
Simple form
could I not exterminate? could you not exterminate? could he not exterminate? could we not exterminate? could you not exterminate? could they not exterminate?
V-ing form
could I not be exterminating? could you not be exterminating? could he not be exterminating? could we not be exterminating? could you not be exterminating? could they not be exterminating?
Perfect
could I not have exterminated? could you not have exterminated? could he not have exterminated? could we not have exterminated? could you not have exterminated? could they not have exterminated?
V-ing perfect
could I not have been exterminating? could you not have been exterminating? could he not have been exterminating? could we not have been exterminating? could you not have been exterminating? could they not have been exterminating?