English verb conjugation
SHOULD COMB

Regular verb: comb - combed - combed

Affirmation

Simple form	V-ing form
I'd comb you'd comb he'd comb we'd comb you'd comb they'd comb	I'd be combing you'd be combing he'd be combing we'd be combing you'd be combing they'd be combing
Perfect	V-ing perfect
I should've combed you should've combed he should've combed we should've combed you should've combed they should've combed	I should've been combing you should've been combing he should've been combing we should've been combing you should've been combing they should've been combing

Negation

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

Interro-negative form

Simple form	V-ing form
shouldn't I comb? shouldn't you comb? shouldn't he comb? shouldn't we comb? shouldn't you comb? shouldn't they comb?	shouldn't I be combing? shouldn't you be combing? shouldn't he be combing? shouldn't we be combing? shouldn't you be combing? shouldn't they be combing?
Perfect	V-ing perfect
shouldn't I have combed? shouldn't you have combed? shouldn't he have combed? shouldn't we have combed? shouldn't you have combed? shouldn't they have combed?	shouldn't I have been combing? shouldn't you have been combing? shouldn't he have been combing? shouldn't we have been combing? shouldn't you have been combing? shouldn't they have been combing?