I could maroon you could maroon he could maroon we could maroon you could maroon they could maroon
V-ing form
I could be marooning you could be marooning he could be marooning we could be marooning you could be marooning they could be marooning
Perfect
I could have marooned you could have marooned he could have marooned we could have marooned you could have marooned they could have marooned
V-ing perfect
I could have been marooning you could have been marooning he could have been marooning we could have been marooning you could have been marooning they could have been marooning
Negation
Simple form
I could not maroon you could not maroon he could not maroon we could not maroon you could not maroon they could not maroon
V-ing form
I could not be marooning you could not be marooning he could not be marooning we could not be marooning you could not be marooning they could not be marooning
Perfect
I could not have marooned you could not have marooned he could not have marooned we could not have marooned you could not have marooned they could not have marooned
V-ing perfect
I could not have been marooning you could not have been marooning he could not have been marooning we could not have been marooning you could not have been marooning they could not have been marooning
Interrogative form
Simple form
could I maroon? could you maroon? could he maroon? could we maroon? could you maroon? could they maroon?
V-ing form
could I be marooning? could you be marooning? could he be marooning? could we be marooning? could you be marooning? could they be marooning?
Perfect
could I have marooned? could you have marooned? could he have marooned? could we have marooned? could you have marooned? could they have marooned?
V-ing perfect
could I have been marooning? could you have been marooning? could he have been marooning? could we have been marooning? could you have been marooning? could they have been marooning?
Interro-negative form
Simple form
could I not maroon? could you not maroon? could he not maroon? could we not maroon? could you not maroon? could they not maroon?
V-ing form
could I not be marooning? could you not be marooning? could he not be marooning? could we not be marooning? could you not be marooning? could they not be marooning?
Perfect
could I not have marooned? could you not have marooned? could he not have marooned? could we not have marooned? could you not have marooned? could they not have marooned?
V-ing perfect
could I not have been marooning? could you not have been marooning? could he not have been marooning? could we not have been marooning? could you not have been marooning? could they not have been marooning?