English verb conjugation
OUGHT TO PREHARDEN

Regular verb: preharden - prehardened - prehardened

Affirmation

Simple form	V-ing form
I ought to preharden you ought to preharden he ought to preharden we ought to preharden you ought to preharden they ought to preharden	I ought to be prehardening you ought to be prehardening he ought to be prehardening we ought to be prehardening you ought to be prehardening they ought to be prehardening
Perfect	V-ing perfect
I ought to have prehardened you ought to have prehardened he ought to have prehardened we ought to have prehardened you ought to have prehardened they ought to have prehardened	I ought to have been prehardening you ought to have been prehardening he ought to have been prehardening we ought to have been prehardening you ought to have been prehardening they ought to have been prehardening

Negation

Simple form	V-ing form
I oughtn't to preharden you oughtn't to preharden he oughtn't to preharden we oughtn't to preharden you oughtn't to preharden they oughtn't to preharden	I oughtn't to be prehardening you oughtn't to be prehardening he oughtn't to be prehardening we oughtn't to be prehardening you oughtn't to be prehardening they oughtn't to be prehardening
Perfect	V-ing perfect
I oughtn't to have prehardened you oughtn't to have prehardened he oughtn't to have prehardened we oughtn't to have prehardened you oughtn't to have prehardened they oughtn't to have prehardened	I oughtn't to have been prehardening you oughtn't to have been prehardening he oughtn't to have been prehardening we oughtn't to have been prehardening you oughtn't to have been prehardening they oughtn't to have been prehardening

Interrogative form

Simple form	V-ing form
ought to I preharden? ought to you preharden? ought to he preharden? ought to we preharden? ought to you preharden? ought to they preharden?	ought to I be prehardening? ought to you be prehardening? ought to he be prehardening? ought to we be prehardening? ought to you be prehardening? ought to they be prehardening?
Perfect	V-ing perfect
ought to I have prehardened? ought to you have prehardened? ought to he have prehardened? ought to we have prehardened? ought to you have prehardened? ought to they have prehardened?	ought to I have been prehardening? ought to you have been prehardening? ought to he have been prehardening? ought to we have been prehardening? ought to you have been prehardening? ought to they have been prehardening?

Interro-negative form

Simple form	V-ing form
oughtn't I to preharden? oughtn't you to preharden? oughtn't he to preharden? oughtn't we to preharden? oughtn't you to preharden? oughtn't they to preharden?	oughtn't I to be prehardening? oughtn't you to be prehardening? oughtn't he to be prehardening? oughtn't we to be prehardening? oughtn't you to be prehardening? oughtn't they to be prehardening?
Perfect	V-ing perfect
oughtn't I to have prehardened? oughtn't you to have prehardened? oughtn't he to have prehardened? oughtn't we to have prehardened? oughtn't you to have prehardened? oughtn't they to have prehardened?	oughtn't I to have been prehardening? oughtn't you to have been prehardening? oughtn't he to have been prehardening? oughtn't we to have been prehardening? oughtn't you to have been prehardening? oughtn't they to have been prehardening?