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 oughtn't to thread you oughtn't to thread he oughtn't to thread we oughtn't to thread you oughtn't to thread they oughtn't to thread	I oughtn't to be threading you oughtn't to be threading he oughtn't to be threading we oughtn't to be threading you oughtn't to be threading they oughtn't to be threading
Perfect	V-ing perfect
I oughtn't to have threaded you oughtn't to have threaded he oughtn't to have threaded we oughtn't to have threaded you oughtn't to have threaded they oughtn't to have threaded	I oughtn't to have been threading you oughtn't to have been threading he oughtn't to have been threading we oughtn't to have been threading you oughtn't to have been threading they oughtn't 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
oughtn't I to thread? oughtn't you to thread? oughtn't he to thread? oughtn't we to thread? oughtn't you to thread? oughtn't they to thread?	oughtn't I to be threading? oughtn't you to be threading? oughtn't he to be threading? oughtn't we to be threading? oughtn't you to be threading? oughtn't they to be threading?
Perfect	V-ing perfect
oughtn't I to have threaded? oughtn't you to have threaded? oughtn't he to have threaded? oughtn't we to have threaded? oughtn't you to have threaded? oughtn't they to have threaded?	oughtn't I to have been threading? oughtn't you to have been threading? oughtn't he to have been threading? oughtn't we to have been threading? oughtn't you to have been threading? oughtn't they to have been threading?