I could urbanize you could urbanize he could urbanize we could urbanize you could urbanize they could urbanize
V-ing form
I could be urbanizing you could be urbanizing he could be urbanizing we could be urbanizing you could be urbanizing they could be urbanizing
Perfect
I could have urbanized you could have urbanized he could have urbanized we could have urbanized you could have urbanized they could have urbanized
V-ing perfect
I could have been urbanizing you could have been urbanizing he could have been urbanizing we could have been urbanizing you could have been urbanizing they could have been urbanizing
Negation
Simple form
I couldn't urbanize you couldn't urbanize he couldn't urbanize we couldn't urbanize you couldn't urbanize they couldn't urbanize
V-ing form
I couldn't be urbanizing you couldn't be urbanizing he couldn't be urbanizing we couldn't be urbanizing you couldn't be urbanizing they couldn't be urbanizing
Perfect
I couldn't have urbanized you couldn't have urbanized he couldn't have urbanized we couldn't have urbanized you couldn't have urbanized they couldn't have urbanized
V-ing perfect
I couldn't have been urbanizing you couldn't have been urbanizing he couldn't have been urbanizing we couldn't have been urbanizing you couldn't have been urbanizing they couldn't have been urbanizing
Interrogative form
Simple form
could I urbanize? could you urbanize? could he urbanize? could we urbanize? could you urbanize? could they urbanize?
V-ing form
could I be urbanizing? could you be urbanizing? could he be urbanizing? could we be urbanizing? could you be urbanizing? could they be urbanizing?
Perfect
could I have urbanized? could you have urbanized? could he have urbanized? could we have urbanized? could you have urbanized? could they have urbanized?
V-ing perfect
could I have been urbanizing? could you have been urbanizing? could he have been urbanizing? could we have been urbanizing? could you have been urbanizing? could they have been urbanizing?
Interro-negative form
Simple form
couldn't I urbanize? couldn't you urbanize? couldn't he urbanize? couldn't we urbanize? couldn't you urbanize? couldn't they urbanize?
V-ing form
couldn't I be urbanizing? couldn't you be urbanizing? couldn't he be urbanizing? couldn't we be urbanizing? couldn't you be urbanizing? couldn't they be urbanizing?
Perfect
couldn't I have urbanized? couldn't you have urbanized? couldn't he have urbanized? couldn't we have urbanized? couldn't you have urbanized? couldn't they have urbanized?
V-ing perfect
couldn't I have been urbanizing? couldn't you have been urbanizing? couldn't he have been urbanizing? couldn't we have been urbanizing? couldn't you have been urbanizing? couldn't they have been urbanizing?