English verb conjugation
OUGHT TO CURTAIL

Regular verb: curtail - curtailed - curtailed

Affirmation

Simple form	V-ing form
I ought to curtail you ought to curtail he ought to curtail we ought to curtail you ought to curtail they ought to curtail	I ought to be curtailing you ought to be curtailing he ought to be curtailing we ought to be curtailing you ought to be curtailing they ought to be curtailing
Perfect	V-ing perfect
I ought to have curtailed you ought to have curtailed he ought to have curtailed we ought to have curtailed you ought to have curtailed they ought to have curtailed	I ought to have been curtailing you ought to have been curtailing he ought to have been curtailing we ought to have been curtailing you ought to have been curtailing they ought to have been curtailing

Negation

Simple form	V-ing form
I oughtn't to curtail you oughtn't to curtail he oughtn't to curtail we oughtn't to curtail you oughtn't to curtail they oughtn't to curtail	I oughtn't to be curtailing you oughtn't to be curtailing he oughtn't to be curtailing we oughtn't to be curtailing you oughtn't to be curtailing they oughtn't to be curtailing
Perfect	V-ing perfect
I oughtn't to have curtailed you oughtn't to have curtailed he oughtn't to have curtailed we oughtn't to have curtailed you oughtn't to have curtailed they oughtn't to have curtailed	I oughtn't to have been curtailing you oughtn't to have been curtailing he oughtn't to have been curtailing we oughtn't to have been curtailing you oughtn't to have been curtailing they oughtn't to have been curtailing

Interrogative form

Simple form	V-ing form
ought to I curtail? ought to you curtail? ought to he curtail? ought to we curtail? ought to you curtail? ought to they curtail?	ought to I be curtailing? ought to you be curtailing? ought to he be curtailing? ought to we be curtailing? ought to you be curtailing? ought to they be curtailing?
Perfect	V-ing perfect
ought to I have curtailed? ought to you have curtailed? ought to he have curtailed? ought to we have curtailed? ought to you have curtailed? ought to they have curtailed?	ought to I have been curtailing? ought to you have been curtailing? ought to he have been curtailing? ought to we have been curtailing? ought to you have been curtailing? ought to they have been curtailing?

Interro-negative form

Simple form	V-ing form
oughtn't I to curtail? oughtn't you to curtail? oughtn't he to curtail? oughtn't we to curtail? oughtn't you to curtail? oughtn't they to curtail?	oughtn't I to be curtailing? oughtn't you to be curtailing? oughtn't he to be curtailing? oughtn't we to be curtailing? oughtn't you to be curtailing? oughtn't they to be curtailing?
Perfect	V-ing perfect
oughtn't I to have curtailed? oughtn't you to have curtailed? oughtn't he to have curtailed? oughtn't we to have curtailed? oughtn't you to have curtailed? oughtn't they to have curtailed?	oughtn't I to have been curtailing? oughtn't you to have been curtailing? oughtn't he to have been curtailing? oughtn't we to have been curtailing? oughtn't you to have been curtailing? oughtn't they to have been curtailing?