English verb conjugation
OUGHT TO CURTAIN

Regular verb: curtain - curtained - curtained

Affirmation

Simple form	V-ing form
I ought to curtain you ought to curtain he ought to curtain we ought to curtain you ought to curtain they ought to curtain	I ought to be curtaining you ought to be curtaining he ought to be curtaining we ought to be curtaining you ought to be curtaining they ought to be curtaining
Perfect	V-ing perfect
I ought to have curtained you ought to have curtained he ought to have curtained we ought to have curtained you ought to have curtained they ought to have curtained	I ought to have been curtaining you ought to have been curtaining he ought to have been curtaining we ought to have been curtaining you ought to have been curtaining they ought to have been curtaining

Negation

Simple form	V-ing form
I oughtn't to curtain you oughtn't to curtain he oughtn't to curtain we oughtn't to curtain you oughtn't to curtain they oughtn't to curtain	I oughtn't to be curtaining you oughtn't to be curtaining he oughtn't to be curtaining we oughtn't to be curtaining you oughtn't to be curtaining they oughtn't to be curtaining
Perfect	V-ing perfect
I oughtn't to have curtained you oughtn't to have curtained he oughtn't to have curtained we oughtn't to have curtained you oughtn't to have curtained they oughtn't to have curtained	I oughtn't to have been curtaining you oughtn't to have been curtaining he oughtn't to have been curtaining we oughtn't to have been curtaining you oughtn't to have been curtaining they oughtn't to have been curtaining

Interrogative form

Simple form	V-ing form
ought to I curtain? ought to you curtain? ought to he curtain? ought to we curtain? ought to you curtain? ought to they curtain?	ought to I be curtaining? ought to you be curtaining? ought to he be curtaining? ought to we be curtaining? ought to you be curtaining? ought to they be curtaining?
Perfect	V-ing perfect
ought to I have curtained? ought to you have curtained? ought to he have curtained? ought to we have curtained? ought to you have curtained? ought to they have curtained?	ought to I have been curtaining? ought to you have been curtaining? ought to he have been curtaining? ought to we have been curtaining? ought to you have been curtaining? ought to they have been curtaining?

Interro-negative form

Simple form	V-ing form
oughtn't I to curtain? oughtn't you to curtain? oughtn't he to curtain? oughtn't we to curtain? oughtn't you to curtain? oughtn't they to curtain?	oughtn't I to be curtaining? oughtn't you to be curtaining? oughtn't he to be curtaining? oughtn't we to be curtaining? oughtn't you to be curtaining? oughtn't they to be curtaining?
Perfect	V-ing perfect
oughtn't I to have curtained? oughtn't you to have curtained? oughtn't he to have curtained? oughtn't we to have curtained? oughtn't you to have curtained? oughtn't they to have curtained?	oughtn't I to have been curtaining? oughtn't you to have been curtaining? oughtn't he to have been curtaining? oughtn't we to have been curtaining? oughtn't you to have been curtaining? oughtn't they to have been curtaining?