ought to underuse
Regular verb: underuse - underused- underused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I ought not to underuse
you ought not to underuse
he ought not to underuse
we ought not to underuse
you ought not to underuse
they ought not to underuse 	I ought not to underusing
you ought not to underusing
he ought not to underusing
we ought not to underusing
you ought not to underusing
they ought not to underusing	I ought not to have underused
you ought not to have underused
he ought not to have underused
we ought not to have underused
you ought not to have underused
they ought not to have underused	I ought not to have been underusing
you ought not to have been underusing
he ought not to have been underusing
we ought not to have been underusing
you ought not to have been underusing
they ought not to have been underusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
ought I not to underuse?
ought you not to underuse?
ought he not to underuse?
ought we not to underuse?
ought you not to underuse?
ought they not to underuse? 	ought I not to be underusing?
ought you not to be underusing?
ought he not to be underusing?
ought we not to be underusing?
ought you not to be underusing?
ought they not to be underusing? 	ought I not to have underused?
ought you not to have underused?
ought he not to have underused?
ought we not to have underused?
ought you not to have underused?
ought they not to have underused? 	ought I not to have been underusing?
ought you not to have been underusing?
ought he not to have been underusing?
ought we not to have been underusing?
ought you not to have been underusing?
ought they not to have been underusing?