English verb conjugation
CAN UNROOF

Regular verb: unroof - unroofed - unroofed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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