I should comb you should comb she should comb we should comb you should comb they should comb
V-ing form
I should be combing you should be combing she should be combing we should be combing you should be combing they should be combing
Perfect
I should have combed you should have combed she should have combed we should have combed you should have combed they should have combed
V-ing perfect
I should have been combing you should have been combing she should have been combing we should have been combing you should have been combing they should have been combing
Negation
Simple form
I should not comb you should not comb she should not comb we should not comb you should not comb they should not comb
V-ing form
I should not be combing you should not be combing she should not be combing we should not be combing you should not be combing they should not be combing
Perfect
I should not have combed you should not have combed she should not have combed we should not have combed you should not have combed they should not have combed
V-ing perfect
I should not have been combing you should not have been combing she should not have been combing we should not have been combing you should not have been combing they should not have been combing
Interrogative form
Simple form
should I comb? should you comb? should she comb? should we comb? should you comb? should they comb?
V-ing form
should I be combing? should you be combing? should she be combing? should we be combing? should you be combing? should they be combing?
Perfect
should I have combed? should you have combed? should she have combed? should we have combed? should you have combed? should they have combed?
V-ing perfect
should I have been combing? should you have been combing? should she have been combing? should we have been combing? should you have been combing? should they have been combing?
Interro-negative form
Simple form
should I not comb? should you not comb? should she not comb? should we not comb? should you not comb? should they not comb?
V-ing form
should I not be combing? should you not be combing? should she not be combing? should we not be combing? should you not be combing? should they not be combing?
Perfect
should I not have combed? should you not have combed? should she not have combed? should we not have combed? should you not have combed? should they not have combed?
V-ing perfect
should I not have been combing? should you not have been combing? should she not have been combing? should we not have been combing? should you not have been combing? should they not have been combing?