I could brabble you could brabble she could brabble we could brabble you could brabble they could brabble
V-ing form
I could be brabbling you could be brabbling she could be brabbling we could be brabbling you could be brabbling they could be brabbling
Perfect
I could have brabbled you could have brabbled she could have brabbled we could have brabbled you could have brabbled they could have brabbled
V-ing perfect
I could have been brabbling you could have been brabbling she could have been brabbling we could have been brabbling you could have been brabbling they could have been brabbling
Negation
Simple form
I could not brabble you could not brabble she could not brabble we could not brabble you could not brabble they could not brabble
V-ing form
I could not be brabbling you could not be brabbling she could not be brabbling we could not be brabbling you could not be brabbling they could not be brabbling
Perfect
I could not have brabbled you could not have brabbled she could not have brabbled we could not have brabbled you could not have brabbled they could not have brabbled
V-ing perfect
I could not have been brabbling you could not have been brabbling she could not have been brabbling we could not have been brabbling you could not have been brabbling they could not have been brabbling
Interrogative form
Simple form
could I brabble? could you brabble? could she brabble? could we brabble? could you brabble? could they brabble?
V-ing form
could I be brabbling? could you be brabbling? could she be brabbling? could we be brabbling? could you be brabbling? could they be brabbling?
Perfect
could I have brabbled? could you have brabbled? could she have brabbled? could we have brabbled? could you have brabbled? could they have brabbled?
V-ing perfect
could I have been brabbling? could you have been brabbling? could she have been brabbling? could we have been brabbling? could you have been brabbling? could they have been brabbling?
Interro-negative form
Simple form
could I not brabble? could you not brabble? could she not brabble? could we not brabble? could you not brabble? could they not brabble?
V-ing form
could I not be brabbling? could you not be brabbling? could she not be brabbling? could we not be brabbling? could you not be brabbling? could they not be brabbling?
Perfect
could I not have brabbled? could you not have brabbled? could she not have brabbled? could we not have brabbled? could you not have brabbled? could they not have brabbled?
V-ing perfect
could I not have been brabbling? could you not have been brabbling? could she not have been brabbling? could we not have been brabbling? could you not have been brabbling? could they not have been brabbling?