English verb conjugation
SHOULD UNDERRATE

Regular verb: underrate - underrated - underrated

Affirmation

Simple form	V-ing form
I'd underrate you'd underrate he'd underrate we'd underrate you'd underrate they'd underrate	I'd be underrating you'd be underrating he'd be underrating we'd be underrating you'd be underrating they'd be underrating
Perfect	V-ing perfect
I should've underrated you should've underrated he should've underrated we should've underrated you should've underrated they should've underrated	I should've been underrating you should've been underrating he should've been underrating we should've been underrating you should've been underrating they should've been underrating

Negation

Simple form	V-ing form
I shouldn't underrate you shouldn't underrate he shouldn't underrate we shouldn't underrate you shouldn't underrate they shouldn't underrate	I shouldn't be underrating you shouldn't be underrating he shouldn't be underrating we shouldn't be underrating you shouldn't be underrating they shouldn't be underrating
Perfect	V-ing perfect
I shouldn't have underrated you shouldn't have underrated he shouldn't have underrated we shouldn't have underrated you shouldn't have underrated they shouldn't have underrated	I shouldn't have been underrating you shouldn't have been underrating he shouldn't have been underrating we shouldn't have been underrating you shouldn't have been underrating they shouldn't have been underrating

Interrogative form

Simple form	V-ing form
should I underrate? should you underrate? should he underrate? should we underrate? should you underrate? should they underrate?	should I be underrating? should you be underrating? should he be underrating? should we be underrating? should you be underrating? should they be underrating?
Perfect	V-ing perfect
should I have underrated? should you have underrated? should he have underrated? should we have underrated? should you have underrated? should they have underrated?	should I have been underrating? should you have been underrating? should he have been underrating? should we have been underrating? should you have been underrating? should they have been underrating?

Interro-negative form

Simple form	V-ing form
shouldn't I underrate? shouldn't you underrate? shouldn't he underrate? shouldn't we underrate? shouldn't you underrate? shouldn't they underrate?	shouldn't I be underrating? shouldn't you be underrating? shouldn't he be underrating? shouldn't we be underrating? shouldn't you be underrating? shouldn't they be underrating?
Perfect	V-ing perfect
shouldn't I have underrated? shouldn't you have underrated? shouldn't he have underrated? shouldn't we have underrated? shouldn't you have underrated? shouldn't they have underrated?	shouldn't I have been underrating? shouldn't you have been underrating? shouldn't he have been underrating? shouldn't we have been underrating? shouldn't you have been underrating? shouldn't they have been underrating?