English verb conjugation
OUGHT TO THREAD

Regular verb: thread - threaded - threaded

Affirmation

Simple form	V-ing form
I ought to thread you ought to thread he ought to thread we ought to thread you ought to thread they ought to thread	I ought to be threading you ought to be threading he ought to be threading we ought to be threading you ought to be threading they ought to be threading
Perfect	V-ing perfect
I ought to have threaded you ought to have threaded he ought to have threaded we ought to have threaded you ought to have threaded they ought to have threaded	I ought to have been threading you ought to have been threading he ought to have been threading we ought to have been threading you ought to have been threading they ought to have been threading

Negation

Simple form	V-ing form
I ought not to thread you ought not to thread he ought not to thread we ought not to thread you ought not to thread they ought not to thread	I ought not to threading you ought not to threading he ought not to threading we ought not to threading you ought not to threading they ought not to threading
Perfect	V-ing perfect
I ought not to have threaded you ought not to have threaded he ought not to have threaded we ought not to have threaded you ought not to have threaded they ought not to have threaded	I ought not to have been threading you ought not to have been threading he ought not to have been threading we ought not to have been threading you ought not to have been threading they ought not to have been threading

Interrogative form

Simple form	V-ing form
ought to I thread? ought to you thread? ought to he thread? ought to we thread? ought to you thread? ought to they thread?	ought to I be threading? ought to you be threading? ought to he be threading? ought to we be threading? ought to you be threading? ought to they be threading?
Perfect	V-ing perfect
ought to I have threaded? ought to you have threaded? ought to he have threaded? ought to we have threaded? ought to you have threaded? ought to they have threaded?	ought to I have been threading? ought to you have been threading? ought to he have been threading? ought to we have been threading? ought to you have been threading? ought to they have been threading?

Interro-negative form

Simple form	V-ing form
ought I not to thread? ought you not to thread? ought he not to thread? ought we not to thread? ought you not to thread? ought they not to thread?	ought I not to be threading? ought you not to be threading? ought he not to be threading? ought we not to be threading? ought you not to be threading? ought they not to be threading?
Perfect	V-ing perfect
ought I not to have threaded? ought you not to have threaded? ought he not to have threaded? ought we not to have threaded? ought you not to have threaded? ought they not to have threaded?	ought I not to have been threading? ought you not to have been threading? ought he not to have been threading? ought we not to have been threading? ought you not to have been threading? ought they not to have been threading?