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 cannot unbox you cannot unbox he cannot unbox we cannot unbox you cannot unbox they cannot unbox	I cannot be unboxing you cannot be unboxing he cannot be unboxing we cannot be unboxing you cannot be unboxing they cannot be unboxing
Perfect	V-ing perfect
I cannot have unboxed you cannot have unboxed he cannot have unboxed we cannot have unboxed you cannot have unboxed they cannot have unboxed	I cannot have been unboxing you cannot have been unboxing he cannot have been unboxing we cannot have been unboxing you cannot have been unboxing they cannot 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 I not unbox? can you not unbox? can he not unbox? can we not unbox? can you not unbox? can they not unbox?	can I not be unboxing? can you not be unboxing? can he not be unboxing? can we not be unboxing? can you not be unboxing? can they not be unboxing?
Perfect	V-ing perfect
can I not have unboxed? can you not have unboxed? can he not have unboxed? can we not have unboxed? can you not have unboxed? can they not have unboxed?	can I not have been unboxing? can you not have been unboxing? can he not have been unboxing? can we not have been unboxing? can you not have been unboxing? can they not have been unboxing?