should gum
Regular verb: gum - gummed- gummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd gum
you'd gum
he'd gum
we'd gum
you'd gum
they'd gum 	I'd be gumming
you'd be gumming
he'd be gumming
we'd be gumming
you'd be gumming
they'd be gumming	I should've gummed
you should've gummed
he should've gummed
we should've gummed
you should've gummed
they should've gummed	I should've been gumming
you should've been gumming
he should've been gumming
we should've been gumming
you should've been gumming
they should've been gumming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't gum
you shouldn't gum
he shouldn't gum
we shouldn't gum
you shouldn't gum
they shouldn't gum 	I shouldn't be gumming
you shouldn't be gumming
he shouldn't be gumming
we shouldn't be gumming
you shouldn't be gumming
they shouldn't be gumming	I shouldn't have gummed
you shouldn't have gummed
he shouldn't have gummed
we shouldn't have gummed
you shouldn't have gummed
they shouldn't have gummed	I shouldn't have been gumming
you shouldn't have been gumming
he shouldn't have been gumming
we shouldn't have been gumming
you shouldn't have been gumming
they shouldn't have been gumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I gum?
should you gum?
should he gum?
should we gum?
should you gum?
should they gum? 	should I be gumming?
should you be gumming?
should he be gumming?
should we be gumming?
should you be gumming?
should they be gumming? 	should I have gummed?
should you have gummed?
should he have gummed?
should we have gummed?
should you have gummed?
should they have gummed? 	should I have been gumming?
should you have been gumming?
should he have been gumming?
should we have been gumming?
should you have been gumming?
should they have been gumming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I gum?
shouldn't you gum?
shouldn't he gum?
shouldn't we gum?
shouldn't you gum?
shouldn't they gum? 	shouldn't I be gumming?
shouldn't you be gumming?
shouldn't he be gumming?
shouldn't we be gumming?
shouldn't you be gumming?
shouldn't they be gumming? 	shouldn't I have gummed?
shouldn't you have gummed?
shouldn't he have gummed?
shouldn't we have gummed?
shouldn't you have gummed?
shouldn't they have gummed? 	shouldn't I have been gumming?
shouldn't you have been gumming?
shouldn't he have been gumming?
shouldn't we have been gumming?
shouldn't you have been gumming?
shouldn't they have been gumming?