I could burgle you could burgle he could burgle we could burgle you could burgle they could burgle
V-ing form
I could be burgling you could be burgling he could be burgling we could be burgling you could be burgling they could be burgling
Perfect
I could have burgled you could have burgled he could have burgled we could have burgled you could have burgled they could have burgled
V-ing perfect
I could have been burgling you could have been burgling he could have been burgling we could have been burgling you could have been burgling they could have been burgling
Negation
Simple form
I could not burgle you could not burgle he could not burgle we could not burgle you could not burgle they could not burgle
V-ing form
I could not be burgling you could not be burgling he could not be burgling we could not be burgling you could not be burgling they could not be burgling
Perfect
I could not have burgled you could not have burgled he could not have burgled we could not have burgled you could not have burgled they could not have burgled
V-ing perfect
I could not have been burgling you could not have been burgling he could not have been burgling we could not have been burgling you could not have been burgling they could not have been burgling
Interrogative form
Simple form
could I burgle? could you burgle? could he burgle? could we burgle? could you burgle? could they burgle?
V-ing form
could I be burgling? could you be burgling? could he be burgling? could we be burgling? could you be burgling? could they be burgling?
Perfect
could I have burgled? could you have burgled? could he have burgled? could we have burgled? could you have burgled? could they have burgled?
V-ing perfect
could I have been burgling? could you have been burgling? could he have been burgling? could we have been burgling? could you have been burgling? could they have been burgling?
Interro-negative form
Simple form
could I not burgle? could you not burgle? could he not burgle? could we not burgle? could you not burgle? could they not burgle?
V-ing form
could I not be burgling? could you not be burgling? could he not be burgling? could we not be burgling? could you not be burgling? could they not be burgling?
Perfect
could I not have burgled? could you not have burgled? could he not have burgled? could we not have burgled? could you not have burgled? could they not have burgled?
V-ing perfect
could I not have been burgling? could you not have been burgling? could he not have been burgling? could we not have been burgling? could you not have been burgling? could they not have been burgling?