English verb conjugation
SHOULD ERR

Regular verb: err - erred - erred

Affirmation

Simple form	V-ing form
I'd err you'd err she'd err we'd err you'd err they'd err	I'd be erring you'd be erring she'd be erring we'd be erring you'd be erring they'd be erring
Perfect	V-ing perfect
I should've erred you should've erred she should've erred we should've erred you should've erred they should've erred	I should've been erring you should've been erring she should've been erring we should've been erring you should've been erring they should've been erring

Negation

Simple form	V-ing form
I shouldn't err you shouldn't err she shouldn't err we shouldn't err you shouldn't err they shouldn't err	I shouldn't be erring you shouldn't be erring she shouldn't be erring we shouldn't be erring you shouldn't be erring they shouldn't be erring
Perfect	V-ing perfect
I shouldn't have erred you shouldn't have erred she shouldn't have erred we shouldn't have erred you shouldn't have erred they shouldn't have erred	I shouldn't have been erring you shouldn't have been erring she shouldn't have been erring we shouldn't have been erring you shouldn't have been erring they shouldn't have been erring

Interrogative form

Simple form	V-ing form
should I err? should you err? should she err? should we err? should you err? should they err?	should I be erring? should you be erring? should she be erring? should we be erring? should you be erring? should they be erring?
Perfect	V-ing perfect
should I have erred? should you have erred? should she have erred? should we have erred? should you have erred? should they have erred?	should I have been erring? should you have been erring? should she have been erring? should we have been erring? should you have been erring? should they have been erring?

Interro-negative form

Simple form	V-ing form
shouldn't I err? shouldn't you err? shouldn't she err? shouldn't we err? shouldn't you err? shouldn't they err?	shouldn't I be erring? shouldn't you be erring? shouldn't she be erring? shouldn't we be erring? shouldn't you be erring? shouldn't they be erring?
Perfect	V-ing perfect
shouldn't I have erred? shouldn't you have erred? shouldn't she have erred? shouldn't we have erred? shouldn't you have erred? shouldn't they have erred?	shouldn't I have been erring? shouldn't you have been erring? shouldn't she have been erring? shouldn't we have been erring? shouldn't you have been erring? shouldn't they have been erring?