I could dye you could dye he could dye we could dye you could dye they could dye
V-ing form
I could be dying you could be dying he could be dying we could be dying you could be dying they could be dying
Perfect
I could have dyed you could have dyed he could have dyed we could have dyed you could have dyed they could have dyed
V-ing perfect
I could have been dying you could have been dying he could have been dying we could have been dying you could have been dying they could have been dying
Negation
Simple form
I could not dye you could not dye he could not dye we could not dye you could not dye they could not dye
V-ing form
I could not be dying you could not be dying he could not be dying we could not be dying you could not be dying they could not be dying
Perfect
I could not have dyed you could not have dyed he could not have dyed we could not have dyed you could not have dyed they could not have dyed
V-ing perfect
I could not have been dying you could not have been dying he could not have been dying we could not have been dying you could not have been dying they could not have been dying
Interrogative form
Simple form
could I dye? could you dye? could he dye? could we dye? could you dye? could they dye?
V-ing form
could I be dying? could you be dying? could he be dying? could we be dying? could you be dying? could they be dying?
Perfect
could I have dyed? could you have dyed? could he have dyed? could we have dyed? could you have dyed? could they have dyed?
V-ing perfect
could I have been dying? could you have been dying? could he have been dying? could we have been dying? could you have been dying? could they have been dying?
Interro-negative form
Simple form
could I not dye? could you not dye? could he not dye? could we not dye? could you not dye? could they not dye?
V-ing form
could I not be dying? could you not be dying? could he not be dying? could we not be dying? could you not be dying? could they not be dying?
Perfect
could I not have dyed? could you not have dyed? could he not have dyed? could we not have dyed? could you not have dyed? could they not have dyed?
V-ing perfect
could I not have been dying? could you not have been dying? could he not have been dying? could we not have been dying? could you not have been dying? could they not have been dying?