should scowl
Regular verb: scowl - scowled- scowled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd scowl
you'd scowl
he'd scowl
we'd scowl
you'd scowl
they'd scowl 	I'd be scowling
you'd be scowling
he'd be scowling
we'd be scowling
you'd be scowling
they'd be scowling	I should've scowled
you should've scowled
he should've scowled
we should've scowled
you should've scowled
they should've scowled	I should've been scowling
you should've been scowling
he should've been scowling
we should've been scowling
you should've been scowling
they should've been scowling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't scowl
you shouldn't scowl
he shouldn't scowl
we shouldn't scowl
you shouldn't scowl
they shouldn't scowl 	I shouldn't be scowling
you shouldn't be scowling
he shouldn't be scowling
we shouldn't be scowling
you shouldn't be scowling
they shouldn't be scowling	I shouldn't have scowled
you shouldn't have scowled
he shouldn't have scowled
we shouldn't have scowled
you shouldn't have scowled
they shouldn't have scowled	I shouldn't have been scowling
you shouldn't have been scowling
he shouldn't have been scowling
we shouldn't have been scowling
you shouldn't have been scowling
they shouldn't have been scowling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I scowl?
should you scowl?
should he scowl?
should we scowl?
should you scowl?
should they scowl? 	should I be scowling?
should you be scowling?
should he be scowling?
should we be scowling?
should you be scowling?
should they be scowling? 	should I have scowled?
should you have scowled?
should he have scowled?
should we have scowled?
should you have scowled?
should they have scowled? 	should I have been scowling?
should you have been scowling?
should he have been scowling?
should we have been scowling?
should you have been scowling?
should they have been scowling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I scowl?
shouldn't you scowl?
shouldn't he scowl?
shouldn't we scowl?
shouldn't you scowl?
shouldn't they scowl? 	shouldn't I be scowling?
shouldn't you be scowling?
shouldn't he be scowling?
shouldn't we be scowling?
shouldn't you be scowling?
shouldn't they be scowling? 	shouldn't I have scowled?
shouldn't you have scowled?
shouldn't he have scowled?
shouldn't we have scowled?
shouldn't you have scowled?
shouldn't they have scowled? 	shouldn't I have been scowling?
shouldn't you have been scowling?
shouldn't he have been scowling?
shouldn't we have been scowling?
shouldn't you have been scowling?
shouldn't they have been scowling?