English verb conjugation
MAY UNDERPERFORM

Regular verb: underperform - underperformed - underperformed

Affirmation

Simple form	V-ing form
I may underperform you may underperform she may underperform we may underperform you may underperform they may underperform	I may be underperforming you may be underperforming she may be underperforming we may be underperforming you may be underperforming they may be underperforming
Perfect	V-ing perfect
I may have underperformed you may have underperformed she may have underperformed we may have underperformed you may have underperformed they may have underperformed	I may have been underperforming you may have been underperforming she may have been underperforming we may have been underperforming you may have been underperforming they may have been underperforming

Negation

Simple form	V-ing form
I mayn't underperform you mayn't underperform she mayn't underperform we mayn't underperform you mayn't underperform they mayn't underperform	I mayn't be underperforming you mayn't be underperforming she mayn't be underperforming we mayn't be underperforming you mayn't be underperforming they mayn't be underperforming
Perfect	V-ing perfect
I mayn't have underperformed you mayn't have underperformed she mayn't have underperformed we mayn't have underperformed you mayn't have underperformed they mayn't have underperformed	I mayn't have been underperforming you mayn't have been underperforming she mayn't have been underperforming we mayn't have been underperforming you mayn't have been underperforming they mayn't have been underperforming

Interrogative form

Simple form	V-ing form
may I underperform? may you underperform? may she underperform? may we underperform? may you underperform? may they underperform?	may I be underperforming? may you be underperforming? may she be underperforming? may we be underperforming? may you be underperforming? may they be underperforming?
Perfect	V-ing perfect
may I have underperformed? may you have underperformed? may she have underperformed? may we have underperformed? may you have underperformed? may they have underperformed?	may I have been underperforming? may you have been underperforming? may she have been underperforming? may we have been underperforming? may you have been underperforming? may they have been underperforming?

Interro-negative form

Simple form	V-ing form
mayn't I underperform? mayn't you underperform? mayn't she underperform? mayn't we underperform? mayn't you underperform? mayn't they underperform?	mayn't I be underperforming? mayn't you be underperforming? mayn't she be underperforming? mayn't we be underperforming? mayn't you be underperforming? mayn't they be underperforming?
Perfect	V-ing perfect
mayn't I have underperformed? mayn't you have underperformed? mayn't she have underperformed? mayn't we have underperformed? mayn't you have underperformed? mayn't they have underperformed?	mayn't I have been underperforming? mayn't you have been underperforming? mayn't she have been underperforming? mayn't we have been underperforming? mayn't you have been underperforming? mayn't they have been underperforming?