should floss
Regular verb: floss - flossed- flossed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd floss
you'd floss
he'd floss
we'd floss
you'd floss
they'd floss 	I'd be flossing
you'd be flossing
he'd be flossing
we'd be flossing
you'd be flossing
they'd be flossing	I should've flossed
you should've flossed
he should've flossed
we should've flossed
you should've flossed
they should've flossed	I should've been flossing
you should've been flossing
he should've been flossing
we should've been flossing
you should've been flossing
they should've been flossing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't floss
you shouldn't floss
he shouldn't floss
we shouldn't floss
you shouldn't floss
they shouldn't floss 	I shouldn't be flossing
you shouldn't be flossing
he shouldn't be flossing
we shouldn't be flossing
you shouldn't be flossing
they shouldn't be flossing	I shouldn't have flossed
you shouldn't have flossed
he shouldn't have flossed
we shouldn't have flossed
you shouldn't have flossed
they shouldn't have flossed	I shouldn't have been flossing
you shouldn't have been flossing
he shouldn't have been flossing
we shouldn't have been flossing
you shouldn't have been flossing
they shouldn't have been flossing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I floss?
should you floss?
should he floss?
should we floss?
should you floss?
should they floss? 	should I be flossing?
should you be flossing?
should he be flossing?
should we be flossing?
should you be flossing?
should they be flossing? 	should I have flossed?
should you have flossed?
should he have flossed?
should we have flossed?
should you have flossed?
should they have flossed? 	should I have been flossing?
should you have been flossing?
should he have been flossing?
should we have been flossing?
should you have been flossing?
should they have been flossing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I floss?
shouldn't you floss?
shouldn't he floss?
shouldn't we floss?
shouldn't you floss?
shouldn't they floss? 	shouldn't I be flossing?
shouldn't you be flossing?
shouldn't he be flossing?
shouldn't we be flossing?
shouldn't you be flossing?
shouldn't they be flossing? 	shouldn't I have flossed?
shouldn't you have flossed?
shouldn't he have flossed?
shouldn't we have flossed?
shouldn't you have flossed?
shouldn't they have flossed? 	shouldn't I have been flossing?
shouldn't you have been flossing?
shouldn't he have been flossing?
shouldn't we have been flossing?
shouldn't you have been flossing?
shouldn't they have been flossing?