English verb conjugation
OUGHT TO WARN

Regular verb: warn - warned - warned

Affirmation

Simple form	V-ing form
I ought to warn you ought to warn he ought to warn we ought to warn you ought to warn they ought to warn	I ought to be warning you ought to be warning he ought to be warning we ought to be warning you ought to be warning they ought to be warning
Perfect	V-ing perfect
I ought to have warned you ought to have warned he ought to have warned we ought to have warned you ought to have warned they ought to have warned	I ought to have been warning you ought to have been warning he ought to have been warning we ought to have been warning you ought to have been warning they ought to have been warning

Negation

Simple form	V-ing form
I oughtn't to warn you oughtn't to warn he oughtn't to warn we oughtn't to warn you oughtn't to warn they oughtn't to warn	I oughtn't to be warning you oughtn't to be warning he oughtn't to be warning we oughtn't to be warning you oughtn't to be warning they oughtn't to be warning
Perfect	V-ing perfect
I oughtn't to have warned you oughtn't to have warned he oughtn't to have warned we oughtn't to have warned you oughtn't to have warned they oughtn't to have warned	I oughtn't to have been warning you oughtn't to have been warning he oughtn't to have been warning we oughtn't to have been warning you oughtn't to have been warning they oughtn't to have been warning

Interrogative form

Simple form	V-ing form
ought to I warn? ought to you warn? ought to he warn? ought to we warn? ought to you warn? ought to they warn?	ought to I be warning? ought to you be warning? ought to he be warning? ought to we be warning? ought to you be warning? ought to they be warning?
Perfect	V-ing perfect
ought to I have warned? ought to you have warned? ought to he have warned? ought to we have warned? ought to you have warned? ought to they have warned?	ought to I have been warning? ought to you have been warning? ought to he have been warning? ought to we have been warning? ought to you have been warning? ought to they have been warning?

Interro-negative form

Simple form	V-ing form
oughtn't I to warn? oughtn't you to warn? oughtn't he to warn? oughtn't we to warn? oughtn't you to warn? oughtn't they to warn?	oughtn't I to be warning? oughtn't you to be warning? oughtn't he to be warning? oughtn't we to be warning? oughtn't you to be warning? oughtn't they to be warning?
Perfect	V-ing perfect
oughtn't I to have warned? oughtn't you to have warned? oughtn't he to have warned? oughtn't we to have warned? oughtn't you to have warned? oughtn't they to have warned?	oughtn't I to have been warning? oughtn't you to have been warning? oughtn't he to have been warning? oughtn't we to have been warning? oughtn't you to have been warning? oughtn't they to have been warning?