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 ought not to preharden you ought not to preharden he ought not to preharden we ought not to preharden you ought not to preharden they ought not to preharden	I ought not to prehardening you ought not to prehardening he ought not to prehardening we ought not to prehardening you ought not to prehardening they ought not to prehardening
Perfect	V-ing perfect
I ought not to have prehardened you ought not to have prehardened he ought not to have prehardened we ought not to have prehardened you ought not to have prehardened they ought not to have prehardened	I ought not to have been prehardening you ought not to have been prehardening he ought not to have been prehardening we ought not to have been prehardening you ought not to have been prehardening they ought not 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
ought I not to preharden? ought you not to preharden? ought he not to preharden? ought we not to preharden? ought you not to preharden? ought they not to preharden?	ought I not to be prehardening? ought you not to be prehardening? ought he not to be prehardening? ought we not to be prehardening? ought you not to be prehardening? ought they not to be prehardening?
Perfect	V-ing perfect
ought I not to have prehardened? ought you not to have prehardened? ought he not to have prehardened? ought we not to have prehardened? ought you not to have prehardened? ought they not to have prehardened?	ought I not to have been prehardening? ought you not to have been prehardening? ought he not to have been prehardening? ought we not to have been prehardening? ought you not to have been prehardening? ought they not to have been prehardening?