English verb conjugation
SHOULD TURN

Regular verb: turn - turned - turned

Affirmation

Simple form	V-ing form
I'd turn you'd turn he'd turn we'd turn you'd turn they'd turn	I'd be turning you'd be turning he'd be turning we'd be turning you'd be turning they'd be turning
Perfect	V-ing perfect
I should've turned you should've turned he should've turned we should've turned you should've turned they should've turned	I should've been turning you should've been turning he should've been turning we should've been turning you should've been turning they should've been turning

Negation

Simple form	V-ing form
I shouldn't turn you shouldn't turn he shouldn't turn we shouldn't turn you shouldn't turn they shouldn't turn	I shouldn't be turning you shouldn't be turning he shouldn't be turning we shouldn't be turning you shouldn't be turning they shouldn't be turning
Perfect	V-ing perfect
I shouldn't have turned you shouldn't have turned he shouldn't have turned we shouldn't have turned you shouldn't have turned they shouldn't have turned	I shouldn't have been turning you shouldn't have been turning he shouldn't have been turning we shouldn't have been turning you shouldn't have been turning they shouldn't have been turning

Interrogative form

Simple form	V-ing form
should I turn? should you turn? should he turn? should we turn? should you turn? should they turn?	should I be turning? should you be turning? should he be turning? should we be turning? should you be turning? should they be turning?
Perfect	V-ing perfect
should I have turned? should you have turned? should he have turned? should we have turned? should you have turned? should they have turned?	should I have been turning? should you have been turning? should he have been turning? should we have been turning? should you have been turning? should they have been turning?

Interro-negative form

Simple form	V-ing form
shouldn't I turn? shouldn't you turn? shouldn't he turn? shouldn't we turn? shouldn't you turn? shouldn't they turn?	shouldn't I be turning? shouldn't you be turning? shouldn't he be turning? shouldn't we be turning? shouldn't you be turning? shouldn't they be turning?
Perfect	V-ing perfect
shouldn't I have turned? shouldn't you have turned? shouldn't he have turned? shouldn't we have turned? shouldn't you have turned? shouldn't they have turned?	shouldn't I have been turning? shouldn't you have been turning? shouldn't he have been turning? shouldn't we have been turning? shouldn't you have been turning? shouldn't they have been turning?