English verb conjugation
SHOULD DOUBLE-BILL

Regular verb: double-bill - double-billed - double-billed

Affirmation

Simple form	V-ing form
I should double-bill you should double-bill she should double-bill we should double-bill you should double-bill they should double-bill	I should be double-billing you should be double-billing she should be double-billing we should be double-billing you should be double-billing they should be double-billing
Perfect	V-ing perfect
I should have double-billed you should have double-billed she should have double-billed we should have double-billed you should have double-billed they should have double-billed	I should have been double-billing you should have been double-billing she should have been double-billing we should have been double-billing you should have been double-billing they should have been double-billing

Negation

Simple form	V-ing form
I should not double-bill you should not double-bill she should not double-bill we should not double-bill you should not double-bill they should not double-bill	I should not be double-billing you should not be double-billing she should not be double-billing we should not be double-billing you should not be double-billing they should not be double-billing
Perfect	V-ing perfect
I should not have double-billed you should not have double-billed she should not have double-billed we should not have double-billed you should not have double-billed they should not have double-billed	I should not have been double-billing you should not have been double-billing she should not have been double-billing we should not have been double-billing you should not have been double-billing they should not have been double-billing

Interrogative form

Simple form	V-ing form
should I double-bill? should you double-bill? should she double-bill? should we double-bill? should you double-bill? should they double-bill?	should I be double-billing? should you be double-billing? should she be double-billing? should we be double-billing? should you be double-billing? should they be double-billing?
Perfect	V-ing perfect
should I have double-billed? should you have double-billed? should she have double-billed? should we have double-billed? should you have double-billed? should they have double-billed?	should I have been double-billing? should you have been double-billing? should she have been double-billing? should we have been double-billing? should you have been double-billing? should they have been double-billing?

Interro-negative form

Simple form	V-ing form
should I not double-bill? should you not double-bill? should she not double-bill? should we not double-bill? should you not double-bill? should they not double-bill?	should I not be double-billing? should you not be double-billing? should she not be double-billing? should we not be double-billing? should you not be double-billing? should they not be double-billing?
Perfect	V-ing perfect
should I not have double-billed? should you not have double-billed? should she not have double-billed? should we not have double-billed? should you not have double-billed? should they not have double-billed?	should I not have been double-billing? should you not have been double-billing? should she not have been double-billing? should we not have been double-billing? should you not have been double-billing? should they not have been double-billing?