English verb conjugation
COULD UNROOF

Regular verb: unroof - unroofed - unroofed

Affirmation

Simple form	V-ing form
I could unroof you could unroof he could unroof we could unroof you could unroof they could unroof	I could be unroofing you could be unroofing he 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 he 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 he 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 could not unroof you could not unroof he could not unroof we could not unroof you could not unroof they could not unroof	I could not be unroofing you could not be unroofing he could not be unroofing we could not be unroofing you could not be unroofing they could not be unroofing
Perfect	V-ing perfect
I could not have unroofed you could not have unroofed he could not have unroofed we could not have unroofed you could not have unroofed they could not have unroofed	I could not have been unroofing you could not have been unroofing he could not have been unroofing we could not have been unroofing you could not have been unroofing they could not have been unroofing

Interrogative form

Simple form	V-ing form
could I unroof? could you unroof? could he unroof? could we unroof? could you unroof? could they unroof?	could I be unroofing? could you be unroofing? could he 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 he 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 he 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
could I not unroof? could you not unroof? could he not unroof? could we not unroof? could you not unroof? could they not unroof?	could I not be unroofing? could you not be unroofing? could he not be unroofing? could we not be unroofing? could you not be unroofing? could they not be unroofing?
Perfect	V-ing perfect
could I not have unroofed? could you not have unroofed? could he not have unroofed? could we not have unroofed? could you not have unroofed? could they not have unroofed?	could I not have been unroofing? could you not have been unroofing? could he not have been unroofing? could we not have been unroofing? could you not have been unroofing? could they not have been unroofing?