I could bribe you could bribe he could bribe we could bribe you could bribe they could bribe
V-ing form
I could be bribing you could be bribing he could be bribing we could be bribing you could be bribing they could be bribing
Perfect
I could have bribed you could have bribed he could have bribed we could have bribed you could have bribed they could have bribed
V-ing perfect
I could have been bribing you could have been bribing he could have been bribing we could have been bribing you could have been bribing they could have been bribing
Negation
Simple form
I couldn't bribe you couldn't bribe he couldn't bribe we couldn't bribe you couldn't bribe they couldn't bribe
V-ing form
I couldn't be bribing you couldn't be bribing he couldn't be bribing we couldn't be bribing you couldn't be bribing they couldn't be bribing
Perfect
I couldn't have bribed you couldn't have bribed he couldn't have bribed we couldn't have bribed you couldn't have bribed they couldn't have bribed
V-ing perfect
I couldn't have been bribing you couldn't have been bribing he couldn't have been bribing we couldn't have been bribing you couldn't have been bribing they couldn't have been bribing
Interrogative form
Simple form
could I bribe? could you bribe? could he bribe? could we bribe? could you bribe? could they bribe?
V-ing form
could I be bribing? could you be bribing? could he be bribing? could we be bribing? could you be bribing? could they be bribing?
Perfect
could I have bribed? could you have bribed? could he have bribed? could we have bribed? could you have bribed? could they have bribed?
V-ing perfect
could I have been bribing? could you have been bribing? could he have been bribing? could we have been bribing? could you have been bribing? could they have been bribing?
Interro-negative form
Simple form
couldn't I bribe? couldn't you bribe? couldn't he bribe? couldn't we bribe? couldn't you bribe? couldn't they bribe?
V-ing form
couldn't I be bribing? couldn't you be bribing? couldn't he be bribing? couldn't we be bribing? couldn't you be bribing? couldn't they be bribing?
Perfect
couldn't I have bribed? couldn't you have bribed? couldn't he have bribed? couldn't we have bribed? couldn't you have bribed? couldn't they have bribed?
V-ing perfect
couldn't I have been bribing? couldn't you have been bribing? couldn't he have been bribing? couldn't we have been bribing? couldn't you have been bribing? couldn't they have been bribing?