English verb conjugation
OUGHT TO DESCALE

Regular verb: descale - descaled - descaled

Affirmation

Simple form	V-ing form
I ought to descale you ought to descale he ought to descale we ought to descale you ought to descale they ought to descale	I ought to be descaling you ought to be descaling he ought to be descaling we ought to be descaling you ought to be descaling they ought to be descaling
Perfect	V-ing perfect
I ought to have descaled you ought to have descaled he ought to have descaled we ought to have descaled you ought to have descaled they ought to have descaled	I ought to have been descaling you ought to have been descaling he ought to have been descaling we ought to have been descaling you ought to have been descaling they ought to have been descaling

Negation

Simple form	V-ing form
I oughtn't to descale you oughtn't to descale he oughtn't to descale we oughtn't to descale you oughtn't to descale they oughtn't to descale	I oughtn't to be descaling you oughtn't to be descaling he oughtn't to be descaling we oughtn't to be descaling you oughtn't to be descaling they oughtn't to be descaling
Perfect	V-ing perfect
I oughtn't to have descaled you oughtn't to have descaled he oughtn't to have descaled we oughtn't to have descaled you oughtn't to have descaled they oughtn't to have descaled	I oughtn't to have been descaling you oughtn't to have been descaling he oughtn't to have been descaling we oughtn't to have been descaling you oughtn't to have been descaling they oughtn't to have been descaling

Interrogative form

Simple form	V-ing form
ought to I descale? ought to you descale? ought to he descale? ought to we descale? ought to you descale? ought to they descale?	ought to I be descaling? ought to you be descaling? ought to he be descaling? ought to we be descaling? ought to you be descaling? ought to they be descaling?
Perfect	V-ing perfect
ought to I have descaled? ought to you have descaled? ought to he have descaled? ought to we have descaled? ought to you have descaled? ought to they have descaled?	ought to I have been descaling? ought to you have been descaling? ought to he have been descaling? ought to we have been descaling? ought to you have been descaling? ought to they have been descaling?

Interro-negative form

Simple form	V-ing form
oughtn't I to descale? oughtn't you to descale? oughtn't he to descale? oughtn't we to descale? oughtn't you to descale? oughtn't they to descale?	oughtn't I to be descaling? oughtn't you to be descaling? oughtn't he to be descaling? oughtn't we to be descaling? oughtn't you to be descaling? oughtn't they to be descaling?
Perfect	V-ing perfect
oughtn't I to have descaled? oughtn't you to have descaled? oughtn't he to have descaled? oughtn't we to have descaled? oughtn't you to have descaled? oughtn't they to have descaled?	oughtn't I to have been descaling? oughtn't you to have been descaling? oughtn't he to have been descaling? oughtn't we to have been descaling? oughtn't you to have been descaling? oughtn't they to have been descaling?