English verb conjugation
CAN UNBOX

Regular verb: unbox - unboxed - unboxed

Affirmation

Simple form	V-ing form
I can unbox you can unbox he can unbox we can unbox you can unbox they can unbox	I can be unboxing you can be unboxing he can be unboxing we can be unboxing you can be unboxing they can be unboxing
Perfect	V-ing perfect
I can have unboxed you can have unboxed he can have unboxed we can have unboxed you can have unboxed they can have unboxed	I can have been unboxing you can have been unboxing he can have been unboxing we can have been unboxing you can have been unboxing they can have been unboxing

Negation

Simple form	V-ing form
I can't unbox you can't unbox he can't unbox we can't unbox you can't unbox they can't unbox	I can't be unboxing you can't be unboxing he can't be unboxing we can't be unboxing you can't be unboxing they can't be unboxing
Perfect	V-ing perfect
I can't have unboxed you can't have unboxed he can't have unboxed we can't have unboxed you can't have unboxed they can't have unboxed	I can't have been unboxing you can't have been unboxing he can't have been unboxing we can't have been unboxing you can't have been unboxing they can't have been unboxing

Interrogative form

Simple form	V-ing form
can I unbox? can you unbox? can he unbox? can we unbox? can you unbox? can they unbox?	can I be unboxing? can you be unboxing? can he be unboxing? can we be unboxing? can you be unboxing? can they be unboxing?
Perfect	V-ing perfect
can I have unboxed? can you have unboxed? can he have unboxed? can we have unboxed? can you have unboxed? can they have unboxed?	can I have been unboxing? can you have been unboxing? can he have been unboxing? can we have been unboxing? can you have been unboxing? can they have been unboxing?

Interro-negative form

Simple form	V-ing form
can't I unbox? can't you unbox? can't he unbox? can't we unbox? can't you unbox? can't they unbox?	can't I be unboxing? can't you be unboxing? can't he be unboxing? can't we be unboxing? can't you be unboxing? can't they be unboxing?
Perfect	V-ing perfect
can't I have unboxed? can't you have unboxed? can't he have unboxed? can't we have unboxed? can't you have unboxed? can't they have unboxed?	can't I have been unboxing? can't you have been unboxing? can't he have been unboxing? can't we have been unboxing? can't you have been unboxing? can't they have been unboxing?