English verb conjugation
SHOULD DOUBLE-BILL

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

Affirmation

Simple form	V-ing form
I'd double-bill you'd double-bill he'd double-bill we'd double-bill you'd double-bill they'd double-bill	I'd be double-billing you'd be double-billing he'd be double-billing we'd be double-billing you'd be double-billing they'd be double-billing
Perfect	V-ing perfect
I should've double-billed you should've double-billed he should've double-billed we should've double-billed you should've double-billed they should've double-billed	I should've been double-billing you should've been double-billing he should've been double-billing we should've been double-billing you should've been double-billing they should've been double-billing

Negation

Simple form	V-ing form
I shouldn't double-bill you shouldn't double-bill he shouldn't double-bill we shouldn't double-bill you shouldn't double-bill they shouldn't double-bill	I shouldn't be double-billing you shouldn't be double-billing he shouldn't be double-billing we shouldn't be double-billing you shouldn't be double-billing they shouldn't be double-billing
Perfect	V-ing perfect
I shouldn't have double-billed you shouldn't have double-billed he shouldn't have double-billed we shouldn't have double-billed you shouldn't have double-billed they shouldn't have double-billed	I shouldn't have been double-billing you shouldn't have been double-billing he shouldn't have been double-billing we shouldn't have been double-billing you shouldn't have been double-billing they shouldn't have been double-billing

Interrogative form

Simple form	V-ing form
should I double-bill? should you double-bill? should he 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 he 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 he 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 he 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
shouldn't I double-bill? shouldn't you double-bill? shouldn't he double-bill? shouldn't we double-bill? shouldn't you double-bill? shouldn't they double-bill?	shouldn't I be double-billing? shouldn't you be double-billing? shouldn't he be double-billing? shouldn't we be double-billing? shouldn't you be double-billing? shouldn't they be double-billing?
Perfect	V-ing perfect
shouldn't I have double-billed? shouldn't you have double-billed? shouldn't he have double-billed? shouldn't we have double-billed? shouldn't you have double-billed? shouldn't they have double-billed?	shouldn't I have been double-billing? shouldn't you have been double-billing? shouldn't he have been double-billing? shouldn't we have been double-billing? shouldn't you have been double-billing? shouldn't they have been double-billing?