English verb conjugation
MAY UNDERUSE

Regular verb: underuse - underused - underused

Affirmation

Simple form	V-ing form
I may underuse you may underuse she may underuse we may underuse you may underuse they may underuse	I may be underusing you may be underusing she may be underusing we may be underusing you may be underusing they may be underusing
Perfect	V-ing perfect
I may have underused you may have underused she may have underused we may have underused you may have underused they may have underused	I may have been underusing you may have been underusing she may have been underusing we may have been underusing you may have been underusing they may have been underusing

Negation

Simple form	V-ing form
I mayn't underuse you mayn't underuse she mayn't underuse we mayn't underuse you mayn't underuse they mayn't underuse	I mayn't be underusing you mayn't be underusing she mayn't be underusing we mayn't be underusing you mayn't be underusing they mayn't be underusing
Perfect	V-ing perfect
I mayn't have underused you mayn't have underused she mayn't have underused we mayn't have underused you mayn't have underused they mayn't have underused	I mayn't have been underusing you mayn't have been underusing she mayn't have been underusing we mayn't have been underusing you mayn't have been underusing they mayn't have been underusing

Interrogative form

Simple form	V-ing form
may I underuse? may you underuse? may she underuse? may we underuse? may you underuse? may they underuse?	may I be underusing? may you be underusing? may she be underusing? may we be underusing? may you be underusing? may they be underusing?
Perfect	V-ing perfect
may I have underused? may you have underused? may she have underused? may we have underused? may you have underused? may they have underused?	may I have been underusing? may you have been underusing? may she have been underusing? may we have been underusing? may you have been underusing? may they have been underusing?

Interro-negative form

Simple form	V-ing form
mayn't I underuse? mayn't you underuse? mayn't she underuse? mayn't we underuse? mayn't you underuse? mayn't they underuse?	mayn't I be underusing? mayn't you be underusing? mayn't she be underusing? mayn't we be underusing? mayn't you be underusing? mayn't they be underusing?
Perfect	V-ing perfect
mayn't I have underused? mayn't you have underused? mayn't she have underused? mayn't we have underused? mayn't you have underused? mayn't they have underused?	mayn't I have been underusing? mayn't you have been underusing? mayn't she have been underusing? mayn't we have been underusing? mayn't you have been underusing? mayn't they have been underusing?