English verb conjugation
SHOULD KNOW

Irregular verb: know - knew - known

Affirmation

Simple form	V-ing form
I'd know you'd know she'd know we'd know you'd know they'd know	I'd be knowing you'd be knowing she'd be knowing we'd be knowing you'd be knowing they'd be knowing
Perfect	V-ing perfect
I should've known you should've known she should've known we should've known you should've known they should've known	I should've been knowing you should've been knowing she should've been knowing we should've been knowing you should've been knowing they should've been knowing

Negation

Simple form	V-ing form
I shouldn't know you shouldn't know she shouldn't know we shouldn't know you shouldn't know they shouldn't know	I shouldn't be knowing you shouldn't be knowing she shouldn't be knowing we shouldn't be knowing you shouldn't be knowing they shouldn't be knowing
Perfect	V-ing perfect
I shouldn't have known you shouldn't have known she shouldn't have known we shouldn't have known you shouldn't have known they shouldn't have known	I shouldn't have been knowing you shouldn't have been knowing she shouldn't have been knowing we shouldn't have been knowing you shouldn't have been knowing they shouldn't have been knowing

Interrogative form

Simple form	V-ing form
should I know? should you know? should she know? should we know? should you know? should they know?	should I be knowing? should you be knowing? should she be knowing? should we be knowing? should you be knowing? should they be knowing?
Perfect	V-ing perfect
should I have known? should you have known? should she have known? should we have known? should you have known? should they have known?	should I have been knowing? should you have been knowing? should she have been knowing? should we have been knowing? should you have been knowing? should they have been knowing?

Interro-negative form

Simple form	V-ing form
shouldn't I know? shouldn't you know? shouldn't she know? shouldn't we know? shouldn't you know? shouldn't they know?	shouldn't I be knowing? shouldn't you be knowing? shouldn't she be knowing? shouldn't we be knowing? shouldn't you be knowing? shouldn't they be knowing?
Perfect	V-ing perfect
shouldn't I have known? shouldn't you have known? shouldn't she have known? shouldn't we have known? shouldn't you have known? shouldn't they have known?	shouldn't I have been knowing? shouldn't you have been knowing? shouldn't she have been knowing? shouldn't we have been knowing? shouldn't you have been knowing? shouldn't they have been knowing?