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