I could blackjack you could blackjack she could blackjack we could blackjack you could blackjack they could blackjack
V-ing form
I could be blackjacking you could be blackjacking she could be blackjacking we could be blackjacking you could be blackjacking they could be blackjacking
Perfect
I could have blackjacked you could have blackjacked she could have blackjacked we could have blackjacked you could have blackjacked they could have blackjacked
V-ing perfect
I could have been blackjacking you could have been blackjacking she could have been blackjacking we could have been blackjacking you could have been blackjacking they could have been blackjacking
Negation
Simple form
I could not blackjack you could not blackjack she could not blackjack we could not blackjack you could not blackjack they could not blackjack
V-ing form
I could not be blackjacking you could not be blackjacking she could not be blackjacking we could not be blackjacking you could not be blackjacking they could not be blackjacking
Perfect
I could not have blackjacked you could not have blackjacked she could not have blackjacked we could not have blackjacked you could not have blackjacked they could not have blackjacked
V-ing perfect
I could not have been blackjacking you could not have been blackjacking she could not have been blackjacking we could not have been blackjacking you could not have been blackjacking they could not have been blackjacking
Interrogative form
Simple form
could I blackjack? could you blackjack? could she blackjack? could we blackjack? could you blackjack? could they blackjack?
V-ing form
could I be blackjacking? could you be blackjacking? could she be blackjacking? could we be blackjacking? could you be blackjacking? could they be blackjacking?
Perfect
could I have blackjacked? could you have blackjacked? could she have blackjacked? could we have blackjacked? could you have blackjacked? could they have blackjacked?
V-ing perfect
could I have been blackjacking? could you have been blackjacking? could she have been blackjacking? could we have been blackjacking? could you have been blackjacking? could they have been blackjacking?
Interro-negative form
Simple form
could I not blackjack? could you not blackjack? could she not blackjack? could we not blackjack? could you not blackjack? could they not blackjack?
V-ing form
could I not be blackjacking? could you not be blackjacking? could she not be blackjacking? could we not be blackjacking? could you not be blackjacking? could they not be blackjacking?
Perfect
could I not have blackjacked? could you not have blackjacked? could she not have blackjacked? could we not have blackjacked? could you not have blackjacked? could they not have blackjacked?
V-ing perfect
could I not have been blackjacking? could you not have been blackjacking? could she not have been blackjacking? could we not have been blackjacking? could you not have been blackjacking? could they not have been blackjacking?