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 can't blackball you can't blackball he can't blackball we can't blackball you can't blackball they can't blackball
V-ing form
I can't be blackballing you can't be blackballing he can't be blackballing we can't be blackballing you can't be blackballing they can't be blackballing
Perfect
I can't have blackballed you can't have blackballed he can't have blackballed we can't have blackballed you can't have blackballed they can't have blackballed
V-ing perfect
I can't have been blackballing you can't have been blackballing he can't have been blackballing we can't have been blackballing you can't have been blackballing they can't 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't I blackball? can't you blackball? can't he blackball? can't we blackball? can't you blackball? can't they blackball?
V-ing form
can't I be blackballing? can't you be blackballing? can't he be blackballing? can't we be blackballing? can't you be blackballing? can't they be blackballing?
Perfect
can't I have blackballed? can't you have blackballed? can't he have blackballed? can't we have blackballed? can't you have blackballed? can't they have blackballed?
V-ing perfect
can't I have been blackballing? can't you have been blackballing? can't he have been blackballing? can't we have been blackballing? can't you have been blackballing? can't they have been blackballing?