English verb conjugation
OUGHT TO DERIVE

Regular verb: derive - derived - derived

Affirmation

Simple form	V-ing form
I ought to derive you ought to derive he ought to derive we ought to derive you ought to derive they ought to derive	I ought to be deriving you ought to be deriving he ought to be deriving we ought to be deriving you ought to be deriving they ought to be deriving
Perfect	V-ing perfect
I ought to have derived you ought to have derived he ought to have derived we ought to have derived you ought to have derived they ought to have derived	I ought to have been deriving you ought to have been deriving he ought to have been deriving we ought to have been deriving you ought to have been deriving they ought to have been deriving

Negation

Simple form	V-ing form
I oughtn't to derive you oughtn't to derive he oughtn't to derive we oughtn't to derive you oughtn't to derive they oughtn't to derive	I oughtn't to be deriving you oughtn't to be deriving he oughtn't to be deriving we oughtn't to be deriving you oughtn't to be deriving they oughtn't to be deriving
Perfect	V-ing perfect
I oughtn't to have derived you oughtn't to have derived he oughtn't to have derived we oughtn't to have derived you oughtn't to have derived they oughtn't to have derived	I oughtn't to have been deriving you oughtn't to have been deriving he oughtn't to have been deriving we oughtn't to have been deriving you oughtn't to have been deriving they oughtn't to have been deriving

Interrogative form

Simple form	V-ing form
ought to I derive? ought to you derive? ought to he derive? ought to we derive? ought to you derive? ought to they derive?	ought to I be deriving? ought to you be deriving? ought to he be deriving? ought to we be deriving? ought to you be deriving? ought to they be deriving?
Perfect	V-ing perfect
ought to I have derived? ought to you have derived? ought to he have derived? ought to we have derived? ought to you have derived? ought to they have derived?	ought to I have been deriving? ought to you have been deriving? ought to he have been deriving? ought to we have been deriving? ought to you have been deriving? ought to they have been deriving?

Interro-negative form

Simple form	V-ing form
oughtn't I to derive? oughtn't you to derive? oughtn't he to derive? oughtn't we to derive? oughtn't you to derive? oughtn't they to derive?	oughtn't I to be deriving? oughtn't you to be deriving? oughtn't he to be deriving? oughtn't we to be deriving? oughtn't you to be deriving? oughtn't they to be deriving?
Perfect	V-ing perfect
oughtn't I to have derived? oughtn't you to have derived? oughtn't he to have derived? oughtn't we to have derived? oughtn't you to have derived? oughtn't they to have derived?	oughtn't I to have been deriving? oughtn't you to have been deriving? oughtn't he to have been deriving? oughtn't we to have been deriving? oughtn't you to have been deriving? oughtn't they to have been deriving?