English verb conjugation
SHOULD DUN

Regular verb: dun - dunned - dunned

Affirmation

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

Negation

Simple form	V-ing form
I should not dun you should not dun he should not dun we should not dun you should not dun they should not dun	I should not be dunning you should not be dunning he should not be dunning we should not be dunning you should not be dunning they should not be dunning
Perfect	V-ing perfect
I should not have dunned you should not have dunned he should not have dunned we should not have dunned you should not have dunned they should not have dunned	I should not have been dunning you should not have been dunning he should not have been dunning we should not have been dunning you should not have been dunning they should not have been dunning

Interrogative form

Simple form	V-ing form
should I dun? should you dun? should he dun? should we dun? should you dun? should they dun?	should I be dunning? should you be dunning? should he 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 he 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 he 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
should I not dun? should you not dun? should he not dun? should we not dun? should you not dun? should they not dun?	should I not be dunning? should you not be dunning? should he not be dunning? should we not be dunning? should you not be dunning? should they not be dunning?
Perfect	V-ing perfect
should I not have dunned? should you not have dunned? should he not have dunned? should we not have dunned? should you not have dunned? should they not have dunned?	should I not have been dunning? should you not have been dunning? should he not have been dunning? should we not have been dunning? should you not have been dunning? should they not have been dunning?