English verb conjugation
WOULD UNDERUSE

Regular verb: underuse - underused - underused

Affirmation

Simple form	V-ing form
I'd underuse you'd underuse he'd underuse we'd underuse you'd underuse they'd underuse	I'd be underusing you'd be underusing he'd be underusing we'd be underusing you'd be underusing they'd be underusing
Perfect	V-ing perfect
I would've underused you would've underused he would've underused we would've underused you would've underused they would've underused	I would've been underusing you would've been underusing he would've been underusing we would've been underusing you would've been underusing they would've been underusing

Negation

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

Interrogative form

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

Interro-negative form

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