English verb conjugation
SHOULD ERR

Regular verb: err - erred - erred

Affirmation

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

Negation

Simple form	V-ing form
I should not err you should not err she should not err we should not err you should not err they should not err	I should not be erring you should not be erring she should not be erring we should not be erring you should not be erring they should not be erring
Perfect	V-ing perfect
I should not have erred you should not have erred she should not have erred we should not have erred you should not have erred they should not have erred	I should not have been erring you should not have been erring she should not have been erring we should not have been erring you should not have been erring they should not 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
should I not err? should you not err? should she not err? should we not err? should you not err? should they not err?	should I not be erring? should you not be erring? should she not be erring? should we not be erring? should you not be erring? should they not be erring?
Perfect	V-ing perfect
should I not have erred? should you not have erred? should she not have erred? should we not have erred? should you not have erred? should they not have erred?	should I not have been erring? should you not have been erring? should she not have been erring? should we not have been erring? should you not have been erring? should they not have been erring?