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 couldn't dye you couldn't dye he couldn't dye we couldn't dye you couldn't dye they couldn't dye
V-ing form
I couldn't be dying you couldn't be dying he couldn't be dying we couldn't be dying you couldn't be dying they couldn't be dying
Perfect
I couldn't have dyed you couldn't have dyed he couldn't have dyed we couldn't have dyed you couldn't have dyed they couldn't have dyed
V-ing perfect
I couldn't have been dying you couldn't have been dying he couldn't have been dying we couldn't have been dying you couldn't have been dying they couldn't 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
couldn't I dye? couldn't you dye? couldn't he dye? couldn't we dye? couldn't you dye? couldn't they dye?
V-ing form
couldn't I be dying? couldn't you be dying? couldn't he be dying? couldn't we be dying? couldn't you be dying? couldn't they be dying?
Perfect
couldn't I have dyed? couldn't you have dyed? couldn't he have dyed? couldn't we have dyed? couldn't you have dyed? couldn't they have dyed?
V-ing perfect
couldn't I have been dying? couldn't you have been dying? couldn't he have been dying? couldn't we have been dying? couldn't you have been dying? couldn't they have been dying?