English verb conjugation
SHOULD BIRL

Regular verb: birl - birled - birled

Affirmation

Simple form	V-ing form
I'd birl you'd birl he'd birl we'd birl you'd birl they'd birl	I'd be birling you'd be birling he'd be birling we'd be birling you'd be birling they'd be birling
Perfect	V-ing perfect
I should've birled you should've birled he should've birled we should've birled you should've birled they should've birled	I should've been birling you should've been birling he should've been birling we should've been birling you should've been birling they should've been birling

Negation

Simple form	V-ing form
I shouldn't birl you shouldn't birl he shouldn't birl we shouldn't birl you shouldn't birl they shouldn't birl	I shouldn't be birling you shouldn't be birling he shouldn't be birling we shouldn't be birling you shouldn't be birling they shouldn't be birling
Perfect	V-ing perfect
I shouldn't have birled you shouldn't have birled he shouldn't have birled we shouldn't have birled you shouldn't have birled they shouldn't have birled	I shouldn't have been birling you shouldn't have been birling he shouldn't have been birling we shouldn't have been birling you shouldn't have been birling they shouldn't have been birling

Interrogative form

Simple form	V-ing form
should I birl? should you birl? should he birl? should we birl? should you birl? should they birl?	should I be birling? should you be birling? should he be birling? should we be birling? should you be birling? should they be birling?
Perfect	V-ing perfect
should I have birled? should you have birled? should he have birled? should we have birled? should you have birled? should they have birled?	should I have been birling? should you have been birling? should he have been birling? should we have been birling? should you have been birling? should they have been birling?

Interro-negative form

Simple form	V-ing form
shouldn't I birl? shouldn't you birl? shouldn't he birl? shouldn't we birl? shouldn't you birl? shouldn't they birl?	shouldn't I be birling? shouldn't you be birling? shouldn't he be birling? shouldn't we be birling? shouldn't you be birling? shouldn't they be birling?
Perfect	V-ing perfect
shouldn't I have birled? shouldn't you have birled? shouldn't he have birled? shouldn't we have birled? shouldn't you have birled? shouldn't they have birled?	shouldn't I have been birling? shouldn't you have been birling? shouldn't he have been birling? shouldn't we have been birling? shouldn't you have been birling? shouldn't they have been birling?