I should stem you should stem he should stem we should stem you should stem they should stem
V-ing form
I should be stemming you should be stemming he should be stemming we should be stemming you should be stemming they should be stemming
Perfect
I should have stemmed you should have stemmed he should have stemmed we should have stemmed you should have stemmed they should have stemmed
V-ing perfect
I should have been stemming you should have been stemming he should have been stemming we should have been stemming you should have been stemming they should have been stemming
Negation
Simple form
I should not stem you should not stem he should not stem we should not stem you should not stem they should not stem
V-ing form
I should not be stemming you should not be stemming he should not be stemming we should not be stemming you should not be stemming they should not be stemming
Perfect
I should not have stemmed you should not have stemmed he should not have stemmed we should not have stemmed you should not have stemmed they should not have stemmed
V-ing perfect
I should not have been stemming you should not have been stemming he should not have been stemming we should not have been stemming you should not have been stemming they should not 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
should I not stem? should you not stem? should he not stem? should we not stem? should you not stem? should they not stem?
V-ing form
should I not be stemming? should you not be stemming? should he not be stemming? should we not be stemming? should you not be stemming? should they not be stemming?
Perfect
should I not have stemmed? should you not have stemmed? should he not have stemmed? should we not have stemmed? should you not have stemmed? should they not have stemmed?
V-ing perfect
should I not have been stemming? should you not have been stemming? should he not have been stemming? should we not have been stemming? should you not have been stemming? should they not have been stemming?