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