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 she 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 she 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 she 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 she 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 ought not to curtail you ought not to curtail she ought not to curtail we ought not to curtail you ought not to curtail they ought not to curtail	I ought not to curtailing you ought not to curtailing she ought not to curtailing we ought not to curtailing you ought not to curtailing they ought not to curtailing
Perfect	V-ing perfect
I ought not to have curtailed you ought not to have curtailed she ought not to have curtailed we ought not to have curtailed you ought not to have curtailed they ought not to have curtailed	I ought not to have been curtailing you ought not to have been curtailing she ought not to have been curtailing we ought not to have been curtailing you ought not to have been curtailing they ought not to have been curtailing

Interrogative form

Simple form	V-ing form
ought to I curtail? ought to you curtail? ought to she 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 she 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 she 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 she 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
ought I not to curtail? ought you not to curtail? ought she not to curtail? ought we not to curtail? ought you not to curtail? ought they not to curtail?	ought I not to be curtailing? ought you not to be curtailing? ought she not to be curtailing? ought we not to be curtailing? ought you not to be curtailing? ought they not to be curtailing?
Perfect	V-ing perfect
ought I not to have curtailed? ought you not to have curtailed? ought she not to have curtailed? ought we not to have curtailed? ought you not to have curtailed? ought they not to have curtailed?	ought I not to have been curtailing? ought you not to have been curtailing? ought she not to have been curtailing? ought we not to have been curtailing? ought you not to have been curtailing? ought they not to have been curtailing?