English verb conjugation
OUGHT TO MAINTAIN

Regular verb: maintain - maintained - maintained

Affirmation

Simple form	V-ing form
I ought to maintain you ought to maintain he ought to maintain we ought to maintain you ought to maintain they ought to maintain	I ought to be maintaining you ought to be maintaining he ought to be maintaining we ought to be maintaining you ought to be maintaining they ought to be maintaining
Perfect	V-ing perfect
I ought to have maintained you ought to have maintained he ought to have maintained we ought to have maintained you ought to have maintained they ought to have maintained	I ought to have been maintaining you ought to have been maintaining he ought to have been maintaining we ought to have been maintaining you ought to have been maintaining they ought to have been maintaining

Negation

Simple form	V-ing form
I ought not to maintain you ought not to maintain he ought not to maintain we ought not to maintain you ought not to maintain they ought not to maintain	I ought not to maintaining you ought not to maintaining he ought not to maintaining we ought not to maintaining you ought not to maintaining they ought not to maintaining
Perfect	V-ing perfect
I ought not to have maintained you ought not to have maintained he ought not to have maintained we ought not to have maintained you ought not to have maintained they ought not to have maintained	I ought not to have been maintaining you ought not to have been maintaining he ought not to have been maintaining we ought not to have been maintaining you ought not to have been maintaining they ought not to have been maintaining

Interrogative form

Simple form	V-ing form
ought to I maintain? ought to you maintain? ought to he maintain? ought to we maintain? ought to you maintain? ought to they maintain?	ought to I be maintaining? ought to you be maintaining? ought to he be maintaining? ought to we be maintaining? ought to you be maintaining? ought to they be maintaining?
Perfect	V-ing perfect
ought to I have maintained? ought to you have maintained? ought to he have maintained? ought to we have maintained? ought to you have maintained? ought to they have maintained?	ought to I have been maintaining? ought to you have been maintaining? ought to he have been maintaining? ought to we have been maintaining? ought to you have been maintaining? ought to they have been maintaining?

Interro-negative form

Simple form	V-ing form
ought I not to maintain? ought you not to maintain? ought he not to maintain? ought we not to maintain? ought you not to maintain? ought they not to maintain?	ought I not to be maintaining? ought you not to be maintaining? ought he not to be maintaining? ought we not to be maintaining? ought you not to be maintaining? ought they not to be maintaining?
Perfect	V-ing perfect
ought I not to have maintained? ought you not to have maintained? ought he not to have maintained? ought we not to have maintained? ought you not to have maintained? ought they not to have maintained?	ought I not to have been maintaining? ought you not to have been maintaining? ought he not to have been maintaining? ought we not to have been maintaining? ought you not to have been maintaining? ought they not to have been maintaining?