I may register you may register she may register we may register you may register they may register
V-ing form
I may be registering you may be registering she may be registering we may be registering you may be registering they may be registering
Perfect
I may have registered you may have registered she may have registered we may have registered you may have registered they may have registered
V-ing perfect
I may have been registering you may have been registering she may have been registering we may have been registering you may have been registering they may have been registering
Negation
Simple form
I may not register you may not register she may not register we may not register you may not register they may not register
V-ing form
I may not be registering you may not be registering she may not be registering we may not be registering you may not be registering they may not be registering
Perfect
I may not have registered you may not have registered she may not have registered we may not have registered you may not have registered they may not have registered
V-ing perfect
I may not have been registering you may not have been registering she may not have been registering we may not have been registering you may not have been registering they may not have been registering
Interrogative form
Simple form
may I register? may you register? may she register? may we register? may you register? may they register?
V-ing form
may I be registering? may you be registering? may she be registering? may we be registering? may you be registering? may they be registering?
Perfect
may I have registered? may you have registered? may she have registered? may we have registered? may you have registered? may they have registered?
V-ing perfect
may I have been registering? may you have been registering? may she have been registering? may we have been registering? may you have been registering? may they have been registering?
Interro-negative form
Simple form
may I not register? may you not register? may she not register? may we not register? may you not register? may they not register?
V-ing form
may I not be registering? may you not be registering? may she not be registering? may we not be registering? may you not be registering? may they not be registering?
Perfect
may I not have registered? may you not have registered? may she not have registered? may we not have registered? may you not have registered? may they not have registered?
V-ing perfect
may I not have been registering? may you not have been registering? may she not have been registering? may we not have been registering? may you not have been registering? may they not have been registering?