I'd be combing you'd be combing she'd be combing we'd be combing you'd be combing they'd be combing
Perfect
I should've combed you should've combed she should've combed we should've combed you should've combed they should've combed
V-ing perfect
I should've been combing you should've been combing she should've been combing we should've been combing you should've been combing they should've been combing
Negation
Simple form
I shouldn't comb you shouldn't comb she shouldn't comb we shouldn't comb you shouldn't comb they shouldn't comb
V-ing form
I shouldn't be combing you shouldn't be combing she shouldn't be combing we shouldn't be combing you shouldn't be combing they shouldn't be combing
Perfect
I shouldn't have combed you shouldn't have combed she shouldn't have combed we shouldn't have combed you shouldn't have combed they shouldn't have combed
V-ing perfect
I shouldn't have been combing you shouldn't have been combing she shouldn't have been combing we shouldn't have been combing you shouldn't have been combing they shouldn't 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
shouldn't I comb? shouldn't you comb? shouldn't she comb? shouldn't we comb? shouldn't you comb? shouldn't they comb?
V-ing form
shouldn't I be combing? shouldn't you be combing? shouldn't she be combing? shouldn't we be combing? shouldn't you be combing? shouldn't they be combing?
Perfect
shouldn't I have combed? shouldn't you have combed? shouldn't she have combed? shouldn't we have combed? shouldn't you have combed? shouldn't they have combed?
V-ing perfect
shouldn't I have been combing? shouldn't you have been combing? shouldn't she have been combing? shouldn't we have been combing? shouldn't you have been combing? shouldn't they have been combing?