English verb conjugation
SHOULD STEM

Regular verb: stem - stemmed - stemmed

Affirmation

Simple form	V-ing form
I'd stem you'd stem she'd stem we'd stem you'd stem they'd stem	I'd be stemming you'd be stemming she'd be stemming we'd be stemming you'd be stemming they'd be stemming
Perfect	V-ing perfect
I should've stemmed you should've stemmed she should've stemmed we should've stemmed you should've stemmed they should've stemmed	I should've been stemming you should've been stemming she should've been stemming we should've been stemming you should've been stemming they should've been stemming

Negation

Simple form	V-ing form
I shouldn't stem you shouldn't stem she shouldn't stem we shouldn't stem you shouldn't stem they shouldn't stem	I shouldn't be stemming you shouldn't be stemming she shouldn't be stemming we shouldn't be stemming you shouldn't be stemming they shouldn't be stemming
Perfect	V-ing perfect
I shouldn't have stemmed you shouldn't have stemmed she shouldn't have stemmed we shouldn't have stemmed you shouldn't have stemmed they shouldn't have stemmed	I shouldn't have been stemming you shouldn't have been stemming she 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	V-ing form
should I stem? should you stem? should she stem? should we stem? should you stem? should they stem?	should I be stemming? should you be stemming? should she be stemming? should we be stemming? should you be stemming? should they be stemming?
Perfect	V-ing perfect
should I have stemmed? should you have stemmed? should she have stemmed? should we have stemmed? should you have stemmed? should they have stemmed?	should I have been stemming? should you have been stemming? should she have been stemming? should we have been stemming? should you have been stemming? should they have been stemming?

Interro-negative form

Simple form	V-ing form
shouldn't I stem? shouldn't you stem? shouldn't she stem? shouldn't we stem? shouldn't you stem? shouldn't they stem?	shouldn't I be stemming? shouldn't you be stemming? shouldn't she be stemming? shouldn't we be stemming? shouldn't you be stemming? shouldn't they be stemming?
Perfect	V-ing perfect
shouldn't I have stemmed? shouldn't you have stemmed? shouldn't she have stemmed? shouldn't we have stemmed? shouldn't you have stemmed? shouldn't they have stemmed?	shouldn't I have been stemming? shouldn't you have been stemming? shouldn't she have been stemming? shouldn't we have been stemming? shouldn't you have been stemming? shouldn't they have been stemming?