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