I could dye you could dye she could dye we could dye you could dye they could dye
V-ing form
I could be dying you could be dying she could be dying we could be dying you could be dying they could be dying
Perfect
I could have dyed you could have dyed she 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 she 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 she 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 she 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 she 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 she 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 she dye? could we dye? could you dye? could they dye?
V-ing form
could I be dying? could you be dying? could she be dying? could we be dying? could you be dying? could they be dying?
Perfect
could I have dyed? could you have dyed? could she 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 she 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 she 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 she 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 she 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 she not have been dying? could we not have been dying? could you not have been dying? could they not have been dying?