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