English verb conjugation
OUGHT TO PREVIEW

Regular verb: preview - previewed - previewed

Affirmation

Simple form	V-ing form
I ought to preview you ought to preview he ought to preview we ought to preview you ought to preview they ought to preview	I ought to be previewing you ought to be previewing he ought to be previewing we ought to be previewing you ought to be previewing they ought to be previewing
Perfect	V-ing perfect
I ought to have previewed you ought to have previewed he ought to have previewed we ought to have previewed you ought to have previewed they ought to have previewed	I ought to have been previewing you ought to have been previewing he ought to have been previewing we ought to have been previewing you ought to have been previewing they ought to have been previewing

Negation

Simple form	V-ing form
I oughtn't to preview you oughtn't to preview he oughtn't to preview we oughtn't to preview you oughtn't to preview they oughtn't to preview	I oughtn't to be previewing you oughtn't to be previewing he oughtn't to be previewing we oughtn't to be previewing you oughtn't to be previewing they oughtn't to be previewing
Perfect	V-ing perfect
I oughtn't to have previewed you oughtn't to have previewed he oughtn't to have previewed we oughtn't to have previewed you oughtn't to have previewed they oughtn't to have previewed	I oughtn't to have been previewing you oughtn't to have been previewing he oughtn't to have been previewing we oughtn't to have been previewing you oughtn't to have been previewing they oughtn't to have been previewing

Interrogative form

Simple form	V-ing form
ought to I preview? ought to you preview? ought to he preview? ought to we preview? ought to you preview? ought to they preview?	ought to I be previewing? ought to you be previewing? ought to he be previewing? ought to we be previewing? ought to you be previewing? ought to they be previewing?
Perfect	V-ing perfect
ought to I have previewed? ought to you have previewed? ought to he have previewed? ought to we have previewed? ought to you have previewed? ought to they have previewed?	ought to I have been previewing? ought to you have been previewing? ought to he have been previewing? ought to we have been previewing? ought to you have been previewing? ought to they have been previewing?

Interro-negative form

Simple form	V-ing form
oughtn't I to preview? oughtn't you to preview? oughtn't he to preview? oughtn't we to preview? oughtn't you to preview? oughtn't they to preview?	oughtn't I to be previewing? oughtn't you to be previewing? oughtn't he to be previewing? oughtn't we to be previewing? oughtn't you to be previewing? oughtn't they to be previewing?
Perfect	V-ing perfect
oughtn't I to have previewed? oughtn't you to have previewed? oughtn't he to have previewed? oughtn't we to have previewed? oughtn't you to have previewed? oughtn't they to have previewed?	oughtn't I to have been previewing? oughtn't you to have been previewing? oughtn't he to have been previewing? oughtn't we to have been previewing? oughtn't you to have been previewing? oughtn't they to have been previewing?