should unbox
Regular verb: unbox - unboxed- unboxed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd unbox
you'd unbox
he'd unbox
we'd unbox
you'd unbox
they'd unbox 	I'd be unboxing
you'd be unboxing
he'd be unboxing
we'd be unboxing
you'd be unboxing
they'd be unboxing	I should've unboxed
you should've unboxed
he should've unboxed
we should've unboxed
you should've unboxed
they should've unboxed	I should've been unboxing
you should've been unboxing
he should've been unboxing
we should've been unboxing
you should've been unboxing
they should've been unboxing	

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

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

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