can blackball
Regular verb: blackball - blackballed- blackballed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I cannot blackball
you cannot blackball
he cannot blackball
we cannot blackball
you cannot blackball
they cannot blackball 	I cannot be blackballing
you cannot be blackballing
he cannot be blackballing
we cannot be blackballing
you cannot be blackballing
they cannot be blackballing	I cannot have blackballed
you cannot have blackballed
he cannot have blackballed
we cannot have blackballed
you cannot have blackballed
they cannot have blackballed	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 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
can I not blackball?
can you not blackball?
can he not blackball?
can we not blackball?
can you not blackball?
can they not blackball? 	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? 	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? 	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?