English verb conjugation
OUGHT TO UNDERUSE

Regular verb: underuse - underused - underused

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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