I can blackmail you can blackmail he can blackmail we can blackmail you can blackmail they can blackmail
V-ing form
I can be blackmailing you can be blackmailing he can be blackmailing we can be blackmailing you can be blackmailing they can be blackmailing
Perfect
I can have blackmailed you can have blackmailed he can have blackmailed we can have blackmailed you can have blackmailed they can have blackmailed
V-ing perfect
I can have been blackmailing you can have been blackmailing he can have been blackmailing we can have been blackmailing you can have been blackmailing they can have been blackmailing
Negation
Simple form
I can't blackmail you can't blackmail he can't blackmail we can't blackmail you can't blackmail they can't blackmail
V-ing form
I can't be blackmailing you can't be blackmailing he can't be blackmailing we can't be blackmailing you can't be blackmailing they can't be blackmailing
Perfect
I can't have blackmailed you can't have blackmailed he can't have blackmailed we can't have blackmailed you can't have blackmailed they can't have blackmailed
V-ing perfect
I can't have been blackmailing you can't have been blackmailing he can't have been blackmailing we can't have been blackmailing you can't have been blackmailing they can't have been blackmailing
Interrogative form
Simple form
can I blackmail? can you blackmail? can he blackmail? can we blackmail? can you blackmail? can they blackmail?
V-ing form
can I be blackmailing? can you be blackmailing? can he be blackmailing? can we be blackmailing? can you be blackmailing? can they be blackmailing?
Perfect
can I have blackmailed? can you have blackmailed? can he have blackmailed? can we have blackmailed? can you have blackmailed? can they have blackmailed?
V-ing perfect
can I have been blackmailing? can you have been blackmailing? can he have been blackmailing? can we have been blackmailing? can you have been blackmailing? can they have been blackmailing?
Interro-negative form
Simple form
can't I blackmail? can't you blackmail? can't he blackmail? can't we blackmail? can't you blackmail? can't they blackmail?
V-ing form
can't I be blackmailing? can't you be blackmailing? can't he be blackmailing? can't we be blackmailing? can't you be blackmailing? can't they be blackmailing?
Perfect
can't I have blackmailed? can't you have blackmailed? can't he have blackmailed? can't we have blackmailed? can't you have blackmailed? can't they have blackmailed?
V-ing perfect
can't I have been blackmailing? can't you have been blackmailing? can't he have been blackmailing? can't we have been blackmailing? can't you have been blackmailing? can't they have been blackmailing?