English verb conjugation
SHOULD SIT

Irregular verb: sit - sat - sat

Affirmation

Simple form	V-ing form
I'd sit you'd sit she'd sit we'd sit you'd sit they'd sit	I'd be sitting you'd be sitting she'd be sitting we'd be sitting you'd be sitting they'd be sitting
Perfect	V-ing perfect
I should've sat you should've sat she should've sat we should've sat you should've sat they should've sat	I should've been sitting you should've been sitting she should've been sitting we should've been sitting you should've been sitting they should've been sitting

Negation

Simple form	V-ing form
I shouldn't sit you shouldn't sit she shouldn't sit we shouldn't sit you shouldn't sit they shouldn't sit	I shouldn't be sitting you shouldn't be sitting she shouldn't be sitting we shouldn't be sitting you shouldn't be sitting they shouldn't be sitting
Perfect	V-ing perfect
I shouldn't have sat you shouldn't have sat she shouldn't have sat we shouldn't have sat you shouldn't have sat they shouldn't have sat	I shouldn't have been sitting you shouldn't have been sitting she shouldn't have been sitting we shouldn't have been sitting you shouldn't have been sitting they shouldn't have been sitting

Interrogative form

Simple form	V-ing form
should I sit? should you sit? should she sit? should we sit? should you sit? should they sit?	should I be sitting? should you be sitting? should she be sitting? should we be sitting? should you be sitting? should they be sitting?
Perfect	V-ing perfect
should I have sat? should you have sat? should she have sat? should we have sat? should you have sat? should they have sat?	should I have been sitting? should you have been sitting? should she have been sitting? should we have been sitting? should you have been sitting? should they have been sitting?

Interro-negative form

Simple form	V-ing form
shouldn't I sit? shouldn't you sit? shouldn't she sit? shouldn't we sit? shouldn't you sit? shouldn't they sit?	shouldn't I be sitting? shouldn't you be sitting? shouldn't she be sitting? shouldn't we be sitting? shouldn't you be sitting? shouldn't they be sitting?
Perfect	V-ing perfect
shouldn't I have sat? shouldn't you have sat? shouldn't she have sat? shouldn't we have sat? shouldn't you have sat? shouldn't they have sat?	shouldn't I have been sitting? shouldn't you have been sitting? shouldn't she have been sitting? shouldn't we have been sitting? shouldn't you have been sitting? shouldn't they have been sitting?