English verb conjugation
OUGHT TO CORROBORATE

Regular verb: corroborate - corroborated - corroborated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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