I could booze you could booze he could booze we could booze you could booze they could booze
V-ing form
I could be boozing you could be boozing he could be boozing we could be boozing you could be boozing they could be boozing
Perfect
I could have boozed you could have boozed he could have boozed we could have boozed you could have boozed they could have boozed
V-ing perfect
I could have been boozing you could have been boozing he could have been boozing we could have been boozing you could have been boozing they could have been boozing
Negation
Simple form
I could not booze you could not booze he could not booze we could not booze you could not booze they could not booze
V-ing form
I could not be boozing you could not be boozing he could not be boozing we could not be boozing you could not be boozing they could not be boozing
Perfect
I could not have boozed you could not have boozed he could not have boozed we could not have boozed you could not have boozed they could not have boozed
V-ing perfect
I could not have been boozing you could not have been boozing he could not have been boozing we could not have been boozing you could not have been boozing they could not have been boozing
Interrogative form
Simple form
could I booze? could you booze? could he booze? could we booze? could you booze? could they booze?
V-ing form
could I be boozing? could you be boozing? could he be boozing? could we be boozing? could you be boozing? could they be boozing?
Perfect
could I have boozed? could you have boozed? could he have boozed? could we have boozed? could you have boozed? could they have boozed?
V-ing perfect
could I have been boozing? could you have been boozing? could he have been boozing? could we have been boozing? could you have been boozing? could they have been boozing?
Interro-negative form
Simple form
could I not booze? could you not booze? could he not booze? could we not booze? could you not booze? could they not booze?
V-ing form
could I not be boozing? could you not be boozing? could he not be boozing? could we not be boozing? could you not be boozing? could they not be boozing?
Perfect
could I not have boozed? could you not have boozed? could he not have boozed? could we not have boozed? could you not have boozed? could they not have boozed?
V-ing perfect
could I not have been boozing? could you not have been boozing? could he not have been boozing? could we not have been boozing? could you not have been boozing? could they not have been boozing?