I could blackball you could blackball she could blackball we could blackball you could blackball they could blackball
V-ing form
I could be blackballing you could be blackballing she could be blackballing we could be blackballing you could be blackballing they could be blackballing
Perfect
I could have blackballed you could have blackballed she could have blackballed we could have blackballed you could have blackballed they could have blackballed
V-ing perfect
I could have been blackballing you could have been blackballing she could have been blackballing we could have been blackballing you could have been blackballing they could have been blackballing
Negation
Simple form
I could not blackball you could not blackball she could not blackball we could not blackball you could not blackball they could not blackball
V-ing form
I could not be blackballing you could not be blackballing she could not be blackballing we could not be blackballing you could not be blackballing they could not be blackballing
Perfect
I could not have blackballed you could not have blackballed she could not have blackballed we could not have blackballed you could not have blackballed they could not have blackballed
V-ing perfect
I could not have been blackballing you could not have been blackballing she could not have been blackballing we could not have been blackballing you could not have been blackballing they could not have been blackballing
Interrogative form
Simple form
could I blackball? could you blackball? could she blackball? could we blackball? could you blackball? could they blackball?
V-ing form
could I be blackballing? could you be blackballing? could she be blackballing? could we be blackballing? could you be blackballing? could they be blackballing?
Perfect
could I have blackballed? could you have blackballed? could she have blackballed? could we have blackballed? could you have blackballed? could they have blackballed?
V-ing perfect
could I have been blackballing? could you have been blackballing? could she have been blackballing? could we have been blackballing? could you have been blackballing? could they have been blackballing?
Interro-negative form
Simple form
could I not blackball? could you not blackball? could she not blackball? could we not blackball? could you not blackball? could they not blackball?
V-ing form
could I not be blackballing? could you not be blackballing? could she not be blackballing? could we not be blackballing? could you not be blackballing? could they not be blackballing?
Perfect
could I not have blackballed? could you not have blackballed? could she not have blackballed? could we not have blackballed? could you not have blackballed? could they not have blackballed?
V-ing perfect
could I not have been blackballing? could you not have been blackballing? could she not have been blackballing? could we not have been blackballing? could you not have been blackballing? could they not have been blackballing?