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 couldn't unroof you couldn't unroof he 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 he 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 he 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 he 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 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
couldn't I unroof? couldn't you unroof? couldn't he 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 he 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 he 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 he have been unroofing? couldn't we have been unroofing? couldn't you have been unroofing? couldn't they have been unroofing?