English verb conjugation
SHOULD DUN

Regular verb: dun - dunned - dunned

Affirmation

Simple form	V-ing form
I'd dun you'd dun she'd dun we'd dun you'd dun they'd dun	I'd be dunning you'd be dunning she'd be dunning we'd be dunning you'd be dunning they'd be dunning
Perfect	V-ing perfect
I should've dunned you should've dunned she should've dunned we should've dunned you should've dunned they should've dunned	I should've been dunning you should've been dunning she should've been dunning we should've been dunning you should've been dunning they should've been dunning

Negation

Simple form	V-ing form
I shouldn't dun you shouldn't dun she shouldn't dun we shouldn't dun you shouldn't dun they shouldn't dun	I shouldn't be dunning you shouldn't be dunning she shouldn't be dunning we shouldn't be dunning you shouldn't be dunning they shouldn't be dunning
Perfect	V-ing perfect
I shouldn't have dunned you shouldn't have dunned she shouldn't have dunned we shouldn't have dunned you shouldn't have dunned they shouldn't have dunned	I shouldn't have been dunning you shouldn't have been dunning she shouldn't have been dunning we shouldn't have been dunning you shouldn't have been dunning they shouldn't have been dunning

Interrogative form

Simple form	V-ing form
should I dun? should you dun? should she dun? should we dun? should you dun? should they dun?	should I be dunning? should you be dunning? should she be dunning? should we be dunning? should you be dunning? should they be dunning?
Perfect	V-ing perfect
should I have dunned? should you have dunned? should she have dunned? should we have dunned? should you have dunned? should they have dunned?	should I have been dunning? should you have been dunning? should she have been dunning? should we have been dunning? should you have been dunning? should they have been dunning?

Interro-negative form

Simple form	V-ing form
shouldn't I dun? shouldn't you dun? shouldn't she dun? shouldn't we dun? shouldn't you dun? shouldn't they dun?	shouldn't I be dunning? shouldn't you be dunning? shouldn't she be dunning? shouldn't we be dunning? shouldn't you be dunning? shouldn't they be dunning?
Perfect	V-ing perfect
shouldn't I have dunned? shouldn't you have dunned? shouldn't she have dunned? shouldn't we have dunned? shouldn't you have dunned? shouldn't they have dunned?	shouldn't I have been dunning? shouldn't you have been dunning? shouldn't she have been dunning? shouldn't we have been dunning? shouldn't you have been dunning? shouldn't they have been dunning?