I'd be snuffing you'd be snuffing he'd be snuffing we'd be snuffing you'd be snuffing they'd be snuffing
Perfect
I should've snuffed you should've snuffed he should've snuffed we should've snuffed you should've snuffed they should've snuffed
V-ing perfect
I should've been snuffing you should've been snuffing he should've been snuffing we should've been snuffing you should've been snuffing they should've been snuffing
Negation
Simple form
I shouldn't snuff you shouldn't snuff he shouldn't snuff we shouldn't snuff you shouldn't snuff they shouldn't snuff
V-ing form
I shouldn't be snuffing you shouldn't be snuffing he shouldn't be snuffing we shouldn't be snuffing you shouldn't be snuffing they shouldn't be snuffing
Perfect
I shouldn't have snuffed you shouldn't have snuffed he shouldn't have snuffed we shouldn't have snuffed you shouldn't have snuffed they shouldn't have snuffed
V-ing perfect
I shouldn't have been snuffing you shouldn't have been snuffing he shouldn't have been snuffing we shouldn't have been snuffing you shouldn't have been snuffing they shouldn't have been snuffing
Interrogative form
Simple form
should I snuff? should you snuff? should he snuff? should we snuff? should you snuff? should they snuff?
V-ing form
should I be snuffing? should you be snuffing? should he be snuffing? should we be snuffing? should you be snuffing? should they be snuffing?
Perfect
should I have snuffed? should you have snuffed? should he have snuffed? should we have snuffed? should you have snuffed? should they have snuffed?
V-ing perfect
should I have been snuffing? should you have been snuffing? should he have been snuffing? should we have been snuffing? should you have been snuffing? should they have been snuffing?
Interro-negative form
Simple form
shouldn't I snuff? shouldn't you snuff? shouldn't he snuff? shouldn't we snuff? shouldn't you snuff? shouldn't they snuff?
V-ing form
shouldn't I be snuffing? shouldn't you be snuffing? shouldn't he be snuffing? shouldn't we be snuffing? shouldn't you be snuffing? shouldn't they be snuffing?
Perfect
shouldn't I have snuffed? shouldn't you have snuffed? shouldn't he have snuffed? shouldn't we have snuffed? shouldn't you have snuffed? shouldn't they have snuffed?
V-ing perfect
shouldn't I have been snuffing? shouldn't you have been snuffing? shouldn't he have been snuffing? shouldn't we have been snuffing? shouldn't you have been snuffing? shouldn't they have been snuffing?