should understock
Regular verb: understock - understocked- understocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd understock
you'd understock
he'd understock
we'd understock
you'd understock
they'd understock 	I'd be understocking
you'd be understocking
he'd be understocking
we'd be understocking
you'd be understocking
they'd be understocking	I should've understocked
you should've understocked
he should've understocked
we should've understocked
you should've understocked
they should've understocked	I should've been understocking
you should've been understocking
he should've been understocking
we should've been understocking
you should've been understocking
they should've been understocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't understock
you shouldn't understock
he shouldn't understock
we shouldn't understock
you shouldn't understock
they shouldn't understock 	I shouldn't be understocking
you shouldn't be understocking
he shouldn't be understocking
we shouldn't be understocking
you shouldn't be understocking
they shouldn't be understocking	I shouldn't have understocked
you shouldn't have understocked
he shouldn't have understocked
we shouldn't have understocked
you shouldn't have understocked
they shouldn't have understocked	I shouldn't have been understocking
you shouldn't have been understocking
he shouldn't have been understocking
we shouldn't have been understocking
you shouldn't have been understocking
they shouldn't have been understocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I understock?
should you understock?
should he understock?
should we understock?
should you understock?
should they understock? 	should I be understocking?
should you be understocking?
should he be understocking?
should we be understocking?
should you be understocking?
should they be understocking? 	should I have understocked?
should you have understocked?
should he have understocked?
should we have understocked?
should you have understocked?
should they have understocked? 	should I have been understocking?
should you have been understocking?
should he have been understocking?
should we have been understocking?
should you have been understocking?
should they have been understocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I understock?
shouldn't you understock?
shouldn't he understock?
shouldn't we understock?
shouldn't you understock?
shouldn't they understock? 	shouldn't I be understocking?
shouldn't you be understocking?
shouldn't he be understocking?
shouldn't we be understocking?
shouldn't you be understocking?
shouldn't they be understocking? 	shouldn't I have understocked?
shouldn't you have understocked?
shouldn't he have understocked?
shouldn't we have understocked?
shouldn't you have understocked?
shouldn't they have understocked? 	shouldn't I have been understocking?
shouldn't you have been understocking?
shouldn't he have been understocking?
shouldn't we have been understocking?
shouldn't you have been understocking?
shouldn't they have been understocking?