I could scam you could scam he could scam we could scam you could scam they could scam
V-ing form
I could be scamming you could be scamming he could be scamming we could be scamming you could be scamming they could be scamming
Perfect
I could have scammed you could have scammed he could have scammed we could have scammed you could have scammed they could have scammed
V-ing perfect
I could have been scamming you could have been scamming he could have been scamming we could have been scamming you could have been scamming they could have been scamming
Negation
Simple form
I could not scam you could not scam he could not scam we could not scam you could not scam they could not scam
V-ing form
I could not be scamming you could not be scamming he could not be scamming we could not be scamming you could not be scamming they could not be scamming
Perfect
I could not have scammed you could not have scammed he could not have scammed we could not have scammed you could not have scammed they could not have scammed
V-ing perfect
I could not have been scamming you could not have been scamming he could not have been scamming we could not have been scamming you could not have been scamming they could not have been scamming
Interrogative form
Simple form
could I scam? could you scam? could he scam? could we scam? could you scam? could they scam?
V-ing form
could I be scamming? could you be scamming? could he be scamming? could we be scamming? could you be scamming? could they be scamming?
Perfect
could I have scammed? could you have scammed? could he have scammed? could we have scammed? could you have scammed? could they have scammed?
V-ing perfect
could I have been scamming? could you have been scamming? could he have been scamming? could we have been scamming? could you have been scamming? could they have been scamming?
Interro-negative form
Simple form
could I not scam? could you not scam? could he not scam? could we not scam? could you not scam? could they not scam?
V-ing form
could I not be scamming? could you not be scamming? could he not be scamming? could we not be scamming? could you not be scamming? could they not be scamming?
Perfect
could I not have scammed? could you not have scammed? could he not have scammed? could we not have scammed? could you not have scammed? could they not have scammed?
V-ing perfect
could I not have been scamming? could you not have been scamming? could he not have been scamming? could we not have been scamming? could you not have been scamming? could they not have been scamming?