English verb conjugation
SHOULD HEIGHTEN

Regular verb: heighten - heightened - heightened

Affirmation

Simple form	V-ing form
I'd heighten you'd heighten he'd heighten we'd heighten you'd heighten they'd heighten	I'd be heightening you'd be heightening he'd be heightening we'd be heightening you'd be heightening they'd be heightening
Perfect	V-ing perfect
I should've heightened you should've heightened he should've heightened we should've heightened you should've heightened they should've heightened	I should've been heightening you should've been heightening he should've been heightening we should've been heightening you should've been heightening they should've been heightening

Negation

Simple form	V-ing form
I shouldn't heighten you shouldn't heighten he shouldn't heighten we shouldn't heighten you shouldn't heighten they shouldn't heighten	I shouldn't be heightening you shouldn't be heightening he shouldn't be heightening we shouldn't be heightening you shouldn't be heightening they shouldn't be heightening
Perfect	V-ing perfect
I shouldn't have heightened you shouldn't have heightened he shouldn't have heightened we shouldn't have heightened you shouldn't have heightened they shouldn't have heightened	I shouldn't have been heightening you shouldn't have been heightening he shouldn't have been heightening we shouldn't have been heightening you shouldn't have been heightening they shouldn't have been heightening

Interrogative form

Simple form	V-ing form
should I heighten? should you heighten? should he heighten? should we heighten? should you heighten? should they heighten?	should I be heightening? should you be heightening? should he be heightening? should we be heightening? should you be heightening? should they be heightening?
Perfect	V-ing perfect
should I have heightened? should you have heightened? should he have heightened? should we have heightened? should you have heightened? should they have heightened?	should I have been heightening? should you have been heightening? should he have been heightening? should we have been heightening? should you have been heightening? should they have been heightening?

Interro-negative form

Simple form	V-ing form
shouldn't I heighten? shouldn't you heighten? shouldn't he heighten? shouldn't we heighten? shouldn't you heighten? shouldn't they heighten?	shouldn't I be heightening? shouldn't you be heightening? shouldn't he be heightening? shouldn't we be heightening? shouldn't you be heightening? shouldn't they be heightening?
Perfect	V-ing perfect
shouldn't I have heightened? shouldn't you have heightened? shouldn't he have heightened? shouldn't we have heightened? shouldn't you have heightened? shouldn't they have heightened?	shouldn't I have been heightening? shouldn't you have been heightening? shouldn't he have been heightening? shouldn't we have been heightening? shouldn't you have been heightening? shouldn't they have been heightening?