ought to derive
Regular verb: derive - derived- derived

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