Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I ought to attend sth you ought to attend sth she ought to attend sth we ought to attend sth you ought to attend sth they ought to attend sth
V-ing form
I ought to be attend sthing you ought to be attend sthing she ought to be attend sthing we ought to be attend sthing you ought to be attend sthing they ought to be attend sthing
Perfect
I ought to have attend sthed you ought to have attend sthed she ought to have attend sthed we ought to have attend sthed you ought to have attend sthed they ought to have attend sthed
V-ing perfect
I ought to have been attend sthing you ought to have been attend sthing she ought to have been attend sthing we ought to have been attend sthing you ought to have been attend sthing they ought to have been attend sthing
Negation
Simple form
I ought not to attend sth you ought not to attend sth she ought not to attend sth we ought not to attend sth you ought not to attend sth they ought not to attend sth
V-ing form
I ought not to attend sthing you ought not to attend sthing she ought not to attend sthing we ought not to attend sthing you ought not to attend sthing they ought not to attend sthing
Perfect
I ought not to have attend sthed you ought not to have attend sthed she ought not to have attend sthed we ought not to have attend sthed you ought not to have attend sthed they ought not to have attend sthed
V-ing perfect
I ought not to have been attend sthing you ought not to have been attend sthing she ought not to have been attend sthing we ought not to have been attend sthing you ought not to have been attend sthing they ought not to have been attend sthing
Interrogative form
Simple form
ought to I attend sth? ought to you attend sth? ought to she attend sth? ought to we attend sth? ought to you attend sth? ought to they attend sth?
V-ing form
ought to I be attend sthing? ought to you be attend sthing? ought to she be attend sthing? ought to we be attend sthing? ought to you be attend sthing? ought to they be attend sthing?
Perfect
ought to I have attend sthed? ought to you have attend sthed? ought to she have attend sthed? ought to we have attend sthed? ought to you have attend sthed? ought to they have attend sthed?
V-ing perfect
ought to I have been attend sthing? ought to you have been attend sthing? ought to she have been attend sthing? ought to we have been attend sthing? ought to you have been attend sthing? ought to they have been attend sthing?
Interro-negative form
Simple form
ought I not to attend sth? ought you not to attend sth? ought she not to attend sth? ought we not to attend sth? ought you not to attend sth? ought they not to attend sth?
V-ing form
ought I not to be attend sthing? ought you not to be attend sthing? ought she not to be attend sthing? ought we not to be attend sthing? ought you not to be attend sthing? ought they not to be attend sthing?
Perfect
ought I not to have attend sthed? ought you not to have attend sthed? ought she not to have attend sthed? ought we not to have attend sthed? ought you not to have attend sthed? ought they not to have attend sthed?
V-ing perfect
ought I not to have been attend sthing? ought you not to have been attend sthing? ought she not to have been attend sthing? ought we not to have been attend sthing? ought you not to have been attend sthing? ought they not to have been attend sthing?