English verb conjugation
SHOULD UNDERPROP

Regular verb: underprop - underproped - underproped

Affirmation

Simple form	V-ing form
I'd underprop you'd underprop he'd underprop we'd underprop you'd underprop they'd underprop	I'd be underproping you'd be underproping he'd be underproping we'd be underproping you'd be underproping they'd be underproping
Perfect	V-ing perfect
I should've underproped you should've underproped he should've underproped we should've underproped you should've underproped they should've underproped	I should've been underproping you should've been underproping he should've been underproping we should've been underproping you should've been underproping they should've been underproping

Negation

Simple form	V-ing form
I shouldn't underprop you shouldn't underprop he shouldn't underprop we shouldn't underprop you shouldn't underprop they shouldn't underprop	I shouldn't be underproping you shouldn't be underproping he shouldn't be underproping we shouldn't be underproping you shouldn't be underproping they shouldn't be underproping
Perfect	V-ing perfect
I shouldn't have underproped you shouldn't have underproped he shouldn't have underproped we shouldn't have underproped you shouldn't have underproped they shouldn't have underproped	I shouldn't have been underproping you shouldn't have been underproping he shouldn't have been underproping we shouldn't have been underproping you shouldn't have been underproping they shouldn't have been underproping

Interrogative form

Simple form	V-ing form
should I underprop? should you underprop? should he underprop? should we underprop? should you underprop? should they underprop?	should I be underproping? should you be underproping? should he be underproping? should we be underproping? should you be underproping? should they be underproping?
Perfect	V-ing perfect
should I have underproped? should you have underproped? should he have underproped? should we have underproped? should you have underproped? should they have underproped?	should I have been underproping? should you have been underproping? should he have been underproping? should we have been underproping? should you have been underproping? should they have been underproping?

Interro-negative form

Simple form	V-ing form
shouldn't I underprop? shouldn't you underprop? shouldn't he underprop? shouldn't we underprop? shouldn't you underprop? shouldn't they underprop?	shouldn't I be underproping? shouldn't you be underproping? shouldn't he be underproping? shouldn't we be underproping? shouldn't you be underproping? shouldn't they be underproping?
Perfect	V-ing perfect
shouldn't I have underproped? shouldn't you have underproped? shouldn't he have underproped? shouldn't we have underproped? shouldn't you have underproped? shouldn't they have underproped?	shouldn't I have been underproping? shouldn't you have been underproping? shouldn't he have been underproping? shouldn't we have been underproping? shouldn't you have been underproping? shouldn't they have been underproping?