I could draw you could draw she could draw we could draw you could draw they could draw
V-ing form
I could be drawing you could be drawing she could be drawing we could be drawing you could be drawing they could be drawing
Perfect
I could have drawn you could have drawn she could have drawn we could have drawn you could have drawn they could have drawn
V-ing perfect
I could have been drawing you could have been drawing she could have been drawing we could have been drawing you could have been drawing they could have been drawing
Negation
Simple form
I could not draw you could not draw she could not draw we could not draw you could not draw they could not draw
V-ing form
I could not be drawing you could not be drawing she could not be drawing we could not be drawing you could not be drawing they could not be drawing
Perfect
I could not have drawn you could not have drawn she could not have drawn we could not have drawn you could not have drawn they could not have drawn
V-ing perfect
I could not have been drawing you could not have been drawing she could not have been drawing we could not have been drawing you could not have been drawing they could not have been drawing
Interrogative form
Simple form
could I draw? could you draw? could she draw? could we draw? could you draw? could they draw?
V-ing form
could I be drawing? could you be drawing? could she be drawing? could we be drawing? could you be drawing? could they be drawing?
Perfect
could I have drawn? could you have drawn? could she have drawn? could we have drawn? could you have drawn? could they have drawn?
V-ing perfect
could I have been drawing? could you have been drawing? could she have been drawing? could we have been drawing? could you have been drawing? could they have been drawing?
Interro-negative form
Simple form
could I not draw? could you not draw? could she not draw? could we not draw? could you not draw? could they not draw?
V-ing form
could I not be drawing? could you not be drawing? could she not be drawing? could we not be drawing? could you not be drawing? could they not be drawing?
Perfect
could I not have drawn? could you not have drawn? could she not have drawn? could we not have drawn? could you not have drawn? could they not have drawn?
V-ing perfect
could I not have been drawing? could you not have been drawing? could she not have been drawing? could we not have been drawing? could you not have been drawing? could they not have been drawing?