English verb conjugation
SHOULD SIFT

Regular verb: sift - sifted - sifted

Affirmation

Simple form	V-ing form
I'd sift you'd sift she'd sift we'd sift you'd sift they'd sift	I'd be sifting you'd be sifting she'd be sifting we'd be sifting you'd be sifting they'd be sifting
Perfect	V-ing perfect
I should've sifted you should've sifted she should've sifted we should've sifted you should've sifted they should've sifted	I should've been sifting you should've been sifting she should've been sifting we should've been sifting you should've been sifting they should've been sifting

Negation

Simple form	V-ing form
I shouldn't sift you shouldn't sift she shouldn't sift we shouldn't sift you shouldn't sift they shouldn't sift	I shouldn't be sifting you shouldn't be sifting she shouldn't be sifting we shouldn't be sifting you shouldn't be sifting they shouldn't be sifting
Perfect	V-ing perfect
I shouldn't have sifted you shouldn't have sifted she shouldn't have sifted we shouldn't have sifted you shouldn't have sifted they shouldn't have sifted	I shouldn't have been sifting you shouldn't have been sifting she shouldn't have been sifting we shouldn't have been sifting you shouldn't have been sifting they shouldn't have been sifting

Interrogative form

Simple form	V-ing form
should I sift? should you sift? should she sift? should we sift? should you sift? should they sift?	should I be sifting? should you be sifting? should she be sifting? should we be sifting? should you be sifting? should they be sifting?
Perfect	V-ing perfect
should I have sifted? should you have sifted? should she have sifted? should we have sifted? should you have sifted? should they have sifted?	should I have been sifting? should you have been sifting? should she have been sifting? should we have been sifting? should you have been sifting? should they have been sifting?

Interro-negative form

Simple form	V-ing form
shouldn't I sift? shouldn't you sift? shouldn't she sift? shouldn't we sift? shouldn't you sift? shouldn't they sift?	shouldn't I be sifting? shouldn't you be sifting? shouldn't she be sifting? shouldn't we be sifting? shouldn't you be sifting? shouldn't they be sifting?
Perfect	V-ing perfect
shouldn't I have sifted? shouldn't you have sifted? shouldn't she have sifted? shouldn't we have sifted? shouldn't you have sifted? shouldn't they have sifted?	shouldn't I have been sifting? shouldn't you have been sifting? shouldn't she have been sifting? shouldn't we have been sifting? shouldn't you have been sifting? shouldn't they have been sifting?