I could brawl you could brawl she could brawl we could brawl you could brawl they could brawl
V-ing form
I could be brawling you could be brawling she could be brawling we could be brawling you could be brawling they could be brawling
Perfect
I could have brawled you could have brawled she could have brawled we could have brawled you could have brawled they could have brawled
V-ing perfect
I could have been brawling you could have been brawling she could have been brawling we could have been brawling you could have been brawling they could have been brawling
Negation
Simple form
I could not brawl you could not brawl she could not brawl we could not brawl you could not brawl they could not brawl
V-ing form
I could not be brawling you could not be brawling she could not be brawling we could not be brawling you could not be brawling they could not be brawling
Perfect
I could not have brawled you could not have brawled she could not have brawled we could not have brawled you could not have brawled they could not have brawled
V-ing perfect
I could not have been brawling you could not have been brawling she could not have been brawling we could not have been brawling you could not have been brawling they could not have been brawling
Interrogative form
Simple form
could I brawl? could you brawl? could she brawl? could we brawl? could you brawl? could they brawl?
V-ing form
could I be brawling? could you be brawling? could she be brawling? could we be brawling? could you be brawling? could they be brawling?
Perfect
could I have brawled? could you have brawled? could she have brawled? could we have brawled? could you have brawled? could they have brawled?
V-ing perfect
could I have been brawling? could you have been brawling? could she have been brawling? could we have been brawling? could you have been brawling? could they have been brawling?
Interro-negative form
Simple form
could I not brawl? could you not brawl? could she not brawl? could we not brawl? could you not brawl? could they not brawl?
V-ing form
could I not be brawling? could you not be brawling? could she not be brawling? could we not be brawling? could you not be brawling? could they not be brawling?
Perfect
could I not have brawled? could you not have brawled? could she not have brawled? could we not have brawled? could you not have brawled? could they not have brawled?
V-ing perfect
could I not have been brawling? could you not have been brawling? could she not have been brawling? could we not have been brawling? could you not have been brawling? could they not have been brawling?