English verb conjugation
SHOULD CORROBORATE

Regular verb: corroborate - corroborated - corroborated

Affirmation

Simple form	V-ing form
I'd corroborate you'd corroborate he'd corroborate we'd corroborate you'd corroborate they'd corroborate	I'd be corroborating you'd be corroborating he'd be corroborating we'd be corroborating you'd be corroborating they'd be corroborating
Perfect	V-ing perfect
I should've corroborated you should've corroborated he should've corroborated we should've corroborated you should've corroborated they should've corroborated	I should've been corroborating you should've been corroborating he should've been corroborating we should've been corroborating you should've been corroborating they should've been corroborating

Negation

Simple form	V-ing form
I shouldn't corroborate you shouldn't corroborate he shouldn't corroborate we shouldn't corroborate you shouldn't corroborate they shouldn't corroborate	I shouldn't be corroborating you shouldn't be corroborating he shouldn't be corroborating we shouldn't be corroborating you shouldn't be corroborating they shouldn't be corroborating
Perfect	V-ing perfect
I shouldn't have corroborated you shouldn't have corroborated he shouldn't have corroborated we shouldn't have corroborated you shouldn't have corroborated they shouldn't have corroborated	I shouldn't have been corroborating you shouldn't have been corroborating he shouldn't have been corroborating we shouldn't have been corroborating you shouldn't have been corroborating they shouldn't have been corroborating

Interrogative form

Simple form	V-ing form
should I corroborate? should you corroborate? should he corroborate? should we corroborate? should you corroborate? should they corroborate?	should I be corroborating? should you be corroborating? should he be corroborating? should we be corroborating? should you be corroborating? should they be corroborating?
Perfect	V-ing perfect
should I have corroborated? should you have corroborated? should he have corroborated? should we have corroborated? should you have corroborated? should they have corroborated?	should I have been corroborating? should you have been corroborating? should he have been corroborating? should we have been corroborating? should you have been corroborating? should they have been corroborating?

Interro-negative form

Simple form	V-ing form
shouldn't I corroborate? shouldn't you corroborate? shouldn't he corroborate? shouldn't we corroborate? shouldn't you corroborate? shouldn't they corroborate?	shouldn't I be corroborating? shouldn't you be corroborating? shouldn't he be corroborating? shouldn't we be corroborating? shouldn't you be corroborating? shouldn't they be corroborating?
Perfect	V-ing perfect
shouldn't I have corroborated? shouldn't you have corroborated? shouldn't he have corroborated? shouldn't we have corroborated? shouldn't you have corroborated? shouldn't they have corroborated?	shouldn't I have been corroborating? shouldn't you have been corroborating? shouldn't he have been corroborating? shouldn't we have been corroborating? shouldn't you have been corroborating? shouldn't they have been corroborating?