English verb conjugation
SHOULD PREHARDEN

Regular verb: preharden - prehardened - prehardened

Affirmation

Simple form	V-ing form
I'd preharden you'd preharden he'd preharden we'd preharden you'd preharden they'd preharden	I'd be prehardening you'd be prehardening he'd be prehardening we'd be prehardening you'd be prehardening they'd be prehardening
Perfect	V-ing perfect
I should've prehardened you should've prehardened he should've prehardened we should've prehardened you should've prehardened they should've prehardened	I should've been prehardening you should've been prehardening he should've been prehardening we should've been prehardening you should've been prehardening they should've been prehardening

Negation

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

Interrogative form

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

Interro-negative form

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