English verb conjugation
SHOULD NAIL

Regular verb: nail - nailed - nailed

Affirmation

Simple form	V-ing form
I'd nail you'd nail he'd nail we'd nail you'd nail they'd nail	I'd be nailing you'd be nailing he'd be nailing we'd be nailing you'd be nailing they'd be nailing
Perfect	V-ing perfect
I should've nailed you should've nailed he should've nailed we should've nailed you should've nailed they should've nailed	I should've been nailing you should've been nailing he should've been nailing we should've been nailing you should've been nailing they should've been nailing

Negation

Simple form	V-ing form
I shouldn't nail you shouldn't nail he shouldn't nail we shouldn't nail you shouldn't nail they shouldn't nail	I shouldn't be nailing you shouldn't be nailing he shouldn't be nailing we shouldn't be nailing you shouldn't be nailing they shouldn't be nailing
Perfect	V-ing perfect
I shouldn't have nailed you shouldn't have nailed he shouldn't have nailed we shouldn't have nailed you shouldn't have nailed they shouldn't have nailed	I shouldn't have been nailing you shouldn't have been nailing he shouldn't have been nailing we shouldn't have been nailing you shouldn't have been nailing they shouldn't have been nailing

Interrogative form

Simple form	V-ing form
should I nail? should you nail? should he nail? should we nail? should you nail? should they nail?	should I be nailing? should you be nailing? should he be nailing? should we be nailing? should you be nailing? should they be nailing?
Perfect	V-ing perfect
should I have nailed? should you have nailed? should he have nailed? should we have nailed? should you have nailed? should they have nailed?	should I have been nailing? should you have been nailing? should he have been nailing? should we have been nailing? should you have been nailing? should they have been nailing?

Interro-negative form

Simple form	V-ing form
shouldn't I nail? shouldn't you nail? shouldn't he nail? shouldn't we nail? shouldn't you nail? shouldn't they nail?	shouldn't I be nailing? shouldn't you be nailing? shouldn't he be nailing? shouldn't we be nailing? shouldn't you be nailing? shouldn't they be nailing?
Perfect	V-ing perfect
shouldn't I have nailed? shouldn't you have nailed? shouldn't he have nailed? shouldn't we have nailed? shouldn't you have nailed? shouldn't they have nailed?	shouldn't I have been nailing? shouldn't you have been nailing? shouldn't he have been nailing? shouldn't we have been nailing? shouldn't you have been nailing? shouldn't they have been nailing?