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 couldn't dye you couldn't dye she 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 she 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 she 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 she 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 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
couldn't I dye? couldn't you dye? couldn't she 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 she 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 she 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 she have been dying? couldn't we have been dying? couldn't you have been dying? couldn't they have been dying?