I should smile you should smile he should smile we should smile you should smile they should smile
V-ing form
I should be smiling you should be smiling he should be smiling we should be smiling you should be smiling they should be smiling
Perfect
I should have smiled you should have smiled he should have smiled we should have smiled you should have smiled they should have smiled
V-ing perfect
I should have been smiling you should have been smiling he should have been smiling we should have been smiling you should have been smiling they should have been smiling
Negation
Simple form
I should not smile you should not smile he should not smile we should not smile you should not smile they should not smile
V-ing form
I should not be smiling you should not be smiling he should not be smiling we should not be smiling you should not be smiling they should not be smiling
Perfect
I should not have smiled you should not have smiled he should not have smiled we should not have smiled you should not have smiled they should not have smiled
V-ing perfect
I should not have been smiling you should not have been smiling he should not have been smiling we should not have been smiling you should not have been smiling they should not have been smiling
Interrogative form
Simple form
should I smile? should you smile? should he smile? should we smile? should you smile? should they smile?
V-ing form
should I be smiling? should you be smiling? should he be smiling? should we be smiling? should you be smiling? should they be smiling?
Perfect
should I have smiled? should you have smiled? should he have smiled? should we have smiled? should you have smiled? should they have smiled?
V-ing perfect
should I have been smiling? should you have been smiling? should he have been smiling? should we have been smiling? should you have been smiling? should they have been smiling?
Interro-negative form
Simple form
should I not smile? should you not smile? should he not smile? should we not smile? should you not smile? should they not smile?
V-ing form
should I not be smiling? should you not be smiling? should he not be smiling? should we not be smiling? should you not be smiling? should they not be smiling?
Perfect
should I not have smiled? should you not have smiled? should he not have smiled? should we not have smiled? should you not have smiled? should they not have smiled?
V-ing perfect
should I not have been smiling? should you not have been smiling? should he not have been smiling? should we not have been smiling? should you not have been smiling? should they not have been smiling?