I'd be regaining you'd be regaining she'd be regaining we'd be regaining you'd be regaining they'd be regaining
Perfect
I should've regained you should've regained she should've regained we should've regained you should've regained they should've regained
V-ing perfect
I should've been regaining you should've been regaining she should've been regaining we should've been regaining you should've been regaining they should've been regaining
Negation
Simple form
I shouldn't regain you shouldn't regain she shouldn't regain we shouldn't regain you shouldn't regain they shouldn't regain
V-ing form
I shouldn't be regaining you shouldn't be regaining she shouldn't be regaining we shouldn't be regaining you shouldn't be regaining they shouldn't be regaining
Perfect
I shouldn't have regained you shouldn't have regained she shouldn't have regained we shouldn't have regained you shouldn't have regained they shouldn't have regained
V-ing perfect
I shouldn't have been regaining you shouldn't have been regaining she shouldn't have been regaining we shouldn't have been regaining you shouldn't have been regaining they shouldn't have been regaining
Interrogative form
Simple form
should I regain? should you regain? should she regain? should we regain? should you regain? should they regain?
V-ing form
should I be regaining? should you be regaining? should she be regaining? should we be regaining? should you be regaining? should they be regaining?
Perfect
should I have regained? should you have regained? should she have regained? should we have regained? should you have regained? should they have regained?
V-ing perfect
should I have been regaining? should you have been regaining? should she have been regaining? should we have been regaining? should you have been regaining? should they have been regaining?
Interro-negative form
Simple form
shouldn't I regain? shouldn't you regain? shouldn't she regain? shouldn't we regain? shouldn't you regain? shouldn't they regain?
V-ing form
shouldn't I be regaining? shouldn't you be regaining? shouldn't she be regaining? shouldn't we be regaining? shouldn't you be regaining? shouldn't they be regaining?
Perfect
shouldn't I have regained? shouldn't you have regained? shouldn't she have regained? shouldn't we have regained? shouldn't you have regained? shouldn't they have regained?
V-ing perfect
shouldn't I have been regaining? shouldn't you have been regaining? shouldn't she have been regaining? shouldn't we have been regaining? shouldn't you have been regaining? shouldn't they have been regaining?