I'd be registering you'd be registering she'd be registering we'd be registering you'd be registering they'd be registering
Perfect
I should've registered you should've registered she 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 she 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 she 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 she 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 she 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 she 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 she register? should we register? should you register? should they register?
V-ing form
should I be registering? should you be registering? should she be registering? should we be registering? should you be registering? should they be registering?
Perfect
should I have registered? should you have registered? should she 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 she 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 she 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 she 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 she 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 she have been registering? shouldn't we have been registering? shouldn't you have been registering? shouldn't they have been registering?