English verb conjugation
CAN BLACKBALL

Regular verb: blackball - blackballed - blackballed

Affirmation

Simple form	V-ing form
I can blackball you can blackball he can blackball we can blackball you can blackball they can blackball	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
can I blackball? can you blackball? can he blackball? can we blackball? can you blackball? can they blackball?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?