I may err you may err she may err we may err you may err they may err
V-ing form
I may be erring you may be erring she may be erring we may be erring you may be erring they may be erring
Perfect
I may have erred you may have erred she may have erred we may have erred you may have erred they may have erred
V-ing perfect
I may have been erring you may have been erring she may have been erring we may have been erring you may have been erring they may have been erring
Negation
Simple form
I may not err you may not err she may not err we may not err you may not err they may not err
V-ing form
I may not be erring you may not be erring she may not be erring we may not be erring you may not be erring they may not be erring
Perfect
I may not have erred you may not have erred she may not have erred we may not have erred you may not have erred they may not have erred
V-ing perfect
I may not have been erring you may not have been erring she may not have been erring we may not have been erring you may not have been erring they may not have been erring
Interrogative form
Simple form
may I err? may you err? may she err? may we err? may you err? may they err?
V-ing form
may I be erring? may you be erring? may she be erring? may we be erring? may you be erring? may they be erring?
Perfect
may I have erred? may you have erred? may she have erred? may we have erred? may you have erred? may they have erred?
V-ing perfect
may I have been erring? may you have been erring? may she have been erring? may we have been erring? may you have been erring? may they have been erring?
Interro-negative form
Simple form
may I not err? may you not err? may she not err? may we not err? may you not err? may they not err?
V-ing form
may I not be erring? may you not be erring? may she not be erring? may we not be erring? may you not be erring? may they not be erring?
Perfect
may I not have erred? may you not have erred? may she not have erred? may we not have erred? may you not have erred? may they not have erred?
V-ing perfect
may I not have been erring? may you not have been erring? may she not have been erring? may we not have been erring? may you not have been erring? may they not have been erring?