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