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