I could flood you could flood she could flood we could flood you could flood they could flood
V-ing form
I could be flooding you could be flooding she could be flooding we could be flooding you could be flooding they could be flooding
Perfect
I could have flooded you could have flooded she could have flooded we could have flooded you could have flooded they could have flooded
V-ing perfect
I could have been flooding you could have been flooding she could have been flooding we could have been flooding you could have been flooding they could have been flooding
Negation
Simple form
I could not flood you could not flood she could not flood we could not flood you could not flood they could not flood
V-ing form
I could not be flooding you could not be flooding she could not be flooding we could not be flooding you could not be flooding they could not be flooding
Perfect
I could not have flooded you could not have flooded she could not have flooded we could not have flooded you could not have flooded they could not have flooded
V-ing perfect
I could not have been flooding you could not have been flooding she could not have been flooding we could not have been flooding you could not have been flooding they could not have been flooding
Interrogative form
Simple form
could I flood? could you flood? could she flood? could we flood? could you flood? could they flood?
V-ing form
could I be flooding? could you be flooding? could she be flooding? could we be flooding? could you be flooding? could they be flooding?
Perfect
could I have flooded? could you have flooded? could she have flooded? could we have flooded? could you have flooded? could they have flooded?
V-ing perfect
could I have been flooding? could you have been flooding? could she have been flooding? could we have been flooding? could you have been flooding? could they have been flooding?
Interro-negative form
Simple form
could I not flood? could you not flood? could she not flood? could we not flood? could you not flood? could they not flood?
V-ing form
could I not be flooding? could you not be flooding? could she not be flooding? could we not be flooding? could you not be flooding? could they not be flooding?
Perfect
could I not have flooded? could you not have flooded? could she not have flooded? could we not have flooded? could you not have flooded? could they not have flooded?
V-ing perfect
could I not have been flooding? could you not have been flooding? could she not have been flooding? could we not have been flooding? could you not have been flooding? could they not have been flooding?