I could urbanize you could urbanize she could urbanize we could urbanize you could urbanize they could urbanize
V-ing form
I could be urbanizing you could be urbanizing she could be urbanizing we could be urbanizing you could be urbanizing they could be urbanizing
Perfect
I could have urbanized you could have urbanized she 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 she 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 she 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 she 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 she 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 she 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 she urbanize? could we urbanize? could you urbanize? could they urbanize?
V-ing form
could I be urbanizing? could you be urbanizing? could she be urbanizing? could we be urbanizing? could you be urbanizing? could they be urbanizing?
Perfect
could I have urbanized? could you have urbanized? could she 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 she 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 she 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 she 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 she 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 she have been urbanizing? couldn't we have been urbanizing? couldn't you have been urbanizing? couldn't they have been urbanizing?