I should post you should post he should post we should post you should post they should post
V-ing form
I should be posting you should be posting he should be posting we should be posting you should be posting they should be posting
Perfect
I should have posted you should have posted he should have posted we should have posted you should have posted they should have posted
V-ing perfect
I should have been posting you should have been posting he should have been posting we should have been posting you should have been posting they should have been posting
Negation
Simple form
I should not post you should not post he should not post we should not post you should not post they should not post
V-ing form
I should not be posting you should not be posting he should not be posting we should not be posting you should not be posting they should not be posting
Perfect
I should not have posted you should not have posted he should not have posted we should not have posted you should not have posted they should not have posted
V-ing perfect
I should not have been posting you should not have been posting he should not have been posting we should not have been posting you should not have been posting they should not have been posting
Interrogative form
Simple form
should I post? should you post? should he post? should we post? should you post? should they post?
V-ing form
should I be posting? should you be posting? should he be posting? should we be posting? should you be posting? should they be posting?
Perfect
should I have posted? should you have posted? should he have posted? should we have posted? should you have posted? should they have posted?
V-ing perfect
should I have been posting? should you have been posting? should he have been posting? should we have been posting? should you have been posting? should they have been posting?
Interro-negative form
Simple form
should I not post? should you not post? should he not post? should we not post? should you not post? should they not post?
V-ing form
should I not be posting? should you not be posting? should he not be posting? should we not be posting? should you not be posting? should they not be posting?
Perfect
should I not have posted? should you not have posted? should he not have posted? should we not have posted? should you not have posted? should they not have posted?
V-ing perfect
should I not have been posting? should you not have been posting? should he not have been posting? should we not have been posting? should you not have been posting? should they not have been posting?