English verb conjugation
OUGHT TO DUN

Regular verb: dun - dunned - dunned

Affirmation

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

Negation

Simple form	V-ing form
I oughtn't to dun you oughtn't to dun he oughtn't to dun we oughtn't to dun you oughtn't to dun they oughtn't to dun	I oughtn't to be dunning you oughtn't to be dunning he oughtn't to be dunning we oughtn't to be dunning you oughtn't to be dunning they oughtn't to be dunning
Perfect	V-ing perfect
I oughtn't to have dunned you oughtn't to have dunned he oughtn't to have dunned we oughtn't to have dunned you oughtn't to have dunned they oughtn't to have dunned	I oughtn't to have been dunning you oughtn't to have been dunning he oughtn't to have been dunning we oughtn't to have been dunning you oughtn't to have been dunning they oughtn't to have been dunning

Interrogative form

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

Interro-negative form

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