ought to differentiate
Regular verb: differentiate - differentiated- differentiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to differentiate
you ought to differentiate
she ought to differentiate
we ought to differentiate
you ought to differentiate
they ought to differentiate 	I ought to be differentiating
you ought to be differentiating
she ought to be differentiating
we ought to be differentiating
you ought to be differentiating
they ought to be differentiating	I ought to have differentiated
you ought to have differentiated
she ought to have differentiated
we ought to have differentiated
you ought to have differentiated
they ought to have differentiated	I ought to have been differentiating
you ought to have been differentiating
she ought to have been differentiating
we ought to have been differentiating
you ought to have been differentiating
they ought to have been differentiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to differentiate
you oughtn't to differentiate
she oughtn't to differentiate
we oughtn't to differentiate
you oughtn't to differentiate
they oughtn't to differentiate 	I oughtn't to be differentiating
you oughtn't to be differentiating
she oughtn't to be differentiating
we oughtn't to be differentiating
you oughtn't to be differentiating
they oughtn't to be differentiating	I oughtn't to have differentiated
you oughtn't to have differentiated
she oughtn't to have differentiated
we oughtn't to have differentiated
you oughtn't to have differentiated
they oughtn't to have differentiated	I oughtn't to have been differentiating
you oughtn't to have been differentiating
she oughtn't to have been differentiating
we oughtn't to have been differentiating
you oughtn't to have been differentiating
they oughtn't to have been differentiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I differentiate?
ought to you differentiate?
ought to she differentiate?
ought to we differentiate?
ought to you differentiate?
ought to they differentiate? 	ought to I be differentiating?
ought to you be differentiating?
ought to she be differentiating?
ought to we be differentiating?
ought to you be differentiating?
ought to they be differentiating? 	ought to I have differentiated?
ought to you have differentiated?
ought to she have differentiated?
ought to we have differentiated?
ought to you have differentiated?
ought to they have differentiated? 	ought to I have been differentiating?
ought to you have been differentiating?
ought to she have been differentiating?
ought to we have been differentiating?
ought to you have been differentiating?
ought to they have been differentiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to differentiate?
oughtn't you to differentiate?
oughtn't she to differentiate?
oughtn't we to differentiate?
oughtn't you to differentiate?
oughtn't they to differentiate? 	oughtn't I to be differentiating?
oughtn't you to be differentiating?
oughtn't she to be differentiating?
oughtn't we to be differentiating?
oughtn't you to be differentiating?
oughtn't they to be differentiating? 	oughtn't I to have differentiated?
oughtn't you to have differentiated?
oughtn't she to have differentiated?
oughtn't we to have differentiated?
oughtn't you to have differentiated?
oughtn't they to have differentiated? 	oughtn't I to have been differentiating?
oughtn't you to have been differentiating?
oughtn't she to have been differentiating?
oughtn't we to have been differentiating?
oughtn't you to have been differentiating?
oughtn't they to have been differentiating?