should scum
Regular verb: scum - scummed- scummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd scum
you'd scum
he'd scum
we'd scum
you'd scum
they'd scum 	I'd be scumming
you'd be scumming
he'd be scumming
we'd be scumming
you'd be scumming
they'd be scumming	I should've scummed
you should've scummed
he should've scummed
we should've scummed
you should've scummed
they should've scummed	I should've been scumming
you should've been scumming
he should've been scumming
we should've been scumming
you should've been scumming
they should've been scumming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't scum
you shouldn't scum
he shouldn't scum
we shouldn't scum
you shouldn't scum
they shouldn't scum 	I shouldn't be scumming
you shouldn't be scumming
he shouldn't be scumming
we shouldn't be scumming
you shouldn't be scumming
they shouldn't be scumming	I shouldn't have scummed
you shouldn't have scummed
he shouldn't have scummed
we shouldn't have scummed
you shouldn't have scummed
they shouldn't have scummed	I shouldn't have been scumming
you shouldn't have been scumming
he shouldn't have been scumming
we shouldn't have been scumming
you shouldn't have been scumming
they shouldn't have been scumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I scum?
should you scum?
should he scum?
should we scum?
should you scum?
should they scum? 	should I be scumming?
should you be scumming?
should he be scumming?
should we be scumming?
should you be scumming?
should they be scumming? 	should I have scummed?
should you have scummed?
should he have scummed?
should we have scummed?
should you have scummed?
should they have scummed? 	should I have been scumming?
should you have been scumming?
should he have been scumming?
should we have been scumming?
should you have been scumming?
should they have been scumming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I scum?
shouldn't you scum?
shouldn't he scum?
shouldn't we scum?
shouldn't you scum?
shouldn't they scum? 	shouldn't I be scumming?
shouldn't you be scumming?
shouldn't he be scumming?
shouldn't we be scumming?
shouldn't you be scumming?
shouldn't they be scumming? 	shouldn't I have scummed?
shouldn't you have scummed?
shouldn't he have scummed?
shouldn't we have scummed?
shouldn't you have scummed?
shouldn't they have scummed? 	shouldn't I have been scumming?
shouldn't you have been scumming?
shouldn't he have been scumming?
shouldn't we have been scumming?
shouldn't you have been scumming?
shouldn't they have been scumming?