English verb conjugation
SHALL ERR

Regular verb: err - erred - erred

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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