English verb conjugation
SHOULD CURTAIL

Regular verb: curtail - curtailed - curtailed

Affirmation

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

Negation

Simple form	V-ing form
I should not curtail you should not curtail he should not curtail we should not curtail you should not curtail they should not curtail	I should not be curtailing you should not be curtailing he should not be curtailing we should not be curtailing you should not be curtailing they should not be curtailing
Perfect	V-ing perfect
I should not have curtailed you should not have curtailed he should not have curtailed we should not have curtailed you should not have curtailed they should not have curtailed	I should not have been curtailing you should not have been curtailing he should not have been curtailing we should not have been curtailing you should not have been curtailing they should not have been curtailing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
should I not curtail? should you not curtail? should he not curtail? should we not curtail? should you not curtail? should they not curtail?	should I not be curtailing? should you not be curtailing? should he not be curtailing? should we not be curtailing? should you not be curtailing? should they not be curtailing?
Perfect	V-ing perfect
should I not have curtailed? should you not have curtailed? should he not have curtailed? should we not have curtailed? should you not have curtailed? should they not have curtailed?	should I not have been curtailing? should you not have been curtailing? should he not have been curtailing? should we not have been curtailing? should you not have been curtailing? should they not have been curtailing?