English verb conjugation
COULD UNROOF

Regular verb: unroof - unroofed - unroofed

Affirmation

Simple form	V-ing form
I could unroof you could unroof she could unroof we could unroof you could unroof they could unroof	I could be unroofing you could be unroofing she could be unroofing we could be unroofing you could be unroofing they could be unroofing
Perfect	V-ing perfect
I could have unroofed you could have unroofed she could have unroofed we could have unroofed you could have unroofed they could have unroofed	I could have been unroofing you could have been unroofing she could have been unroofing we could have been unroofing you could have been unroofing they could have been unroofing

Negation

Simple form	V-ing form
I couldn't unroof you couldn't unroof she couldn't unroof we couldn't unroof you couldn't unroof they couldn't unroof	I couldn't be unroofing you couldn't be unroofing she couldn't be unroofing we couldn't be unroofing you couldn't be unroofing they couldn't be unroofing
Perfect	V-ing perfect
I couldn't have unroofed you couldn't have unroofed she couldn't have unroofed we couldn't have unroofed you couldn't have unroofed they couldn't have unroofed	I couldn't have been unroofing you couldn't have been unroofing she couldn't have been unroofing we couldn't have been unroofing you couldn't have been unroofing they couldn't have been unroofing

Interrogative form

Simple form	V-ing form
could I unroof? could you unroof? could she unroof? could we unroof? could you unroof? could they unroof?	could I be unroofing? could you be unroofing? could she be unroofing? could we be unroofing? could you be unroofing? could they be unroofing?
Perfect	V-ing perfect
could I have unroofed? could you have unroofed? could she have unroofed? could we have unroofed? could you have unroofed? could they have unroofed?	could I have been unroofing? could you have been unroofing? could she have been unroofing? could we have been unroofing? could you have been unroofing? could they have been unroofing?

Interro-negative form

Simple form	V-ing form
couldn't I unroof? couldn't you unroof? couldn't she unroof? couldn't we unroof? couldn't you unroof? couldn't they unroof?	couldn't I be unroofing? couldn't you be unroofing? couldn't she be unroofing? couldn't we be unroofing? couldn't you be unroofing? couldn't they be unroofing?
Perfect	V-ing perfect
couldn't I have unroofed? couldn't you have unroofed? couldn't she have unroofed? couldn't we have unroofed? couldn't you have unroofed? couldn't they have unroofed?	couldn't I have been unroofing? couldn't you have been unroofing? couldn't she have been unroofing? couldn't we have been unroofing? couldn't you have been unroofing? couldn't they have been unroofing?