ought to curtail
Regular verb: curtail - curtailed- curtailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to curtail
you ought to curtail
she ought to curtail
we ought to curtail
you ought to curtail
they ought to curtail 	I ought to be curtailing
you ought to be curtailing
she ought to be curtailing
we ought to be curtailing
you ought to be curtailing
they ought to be curtailing	I ought to have curtailed
you ought to have curtailed
she ought to have curtailed
we ought to have curtailed
you ought to have curtailed
they ought to have curtailed	I ought to have been curtailing
you ought to have been curtailing
she ought to have been curtailing
we ought to have been curtailing
you ought to have been curtailing
they ought to have been curtailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to curtail
you oughtn't to curtail
she oughtn't to curtail
we oughtn't to curtail
you oughtn't to curtail
they oughtn't to curtail 	I oughtn't to be curtailing
you oughtn't to be curtailing
she oughtn't to be curtailing
we oughtn't to be curtailing
you oughtn't to be curtailing
they oughtn't to be curtailing	I oughtn't to have curtailed
you oughtn't to have curtailed
she oughtn't to have curtailed
we oughtn't to have curtailed
you oughtn't to have curtailed
they oughtn't to have curtailed	I oughtn't to have been curtailing
you oughtn't to have been curtailing
she oughtn't to have been curtailing
we oughtn't to have been curtailing
you oughtn't to have been curtailing
they oughtn't to have been curtailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I curtail?
ought to you curtail?
ought to she curtail?
ought to we curtail?
ought to you curtail?
ought to they curtail? 	ought to I be curtailing?
ought to you be curtailing?
ought to she be curtailing?
ought to we be curtailing?
ought to you be curtailing?
ought to they be curtailing? 	ought to I have curtailed?
ought to you have curtailed?
ought to she have curtailed?
ought to we have curtailed?
ought to you have curtailed?
ought to they have curtailed? 	ought to I have been curtailing?
ought to you have been curtailing?
ought to she have been curtailing?
ought to we have been curtailing?
ought to you have been curtailing?
ought to they have been curtailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to curtail?
oughtn't you to curtail?
oughtn't she to curtail?
oughtn't we to curtail?
oughtn't you to curtail?
oughtn't they to curtail? 	oughtn't I to be curtailing?
oughtn't you to be curtailing?
oughtn't she to be curtailing?
oughtn't we to be curtailing?
oughtn't you to be curtailing?
oughtn't they to be curtailing? 	oughtn't I to have curtailed?
oughtn't you to have curtailed?
oughtn't she to have curtailed?
oughtn't we to have curtailed?
oughtn't you to have curtailed?
oughtn't they to have curtailed? 	oughtn't I to have been curtailing?
oughtn't you to have been curtailing?
oughtn't she to have been curtailing?
oughtn't we to have been curtailing?
oughtn't you to have been curtailing?
oughtn't they to have been curtailing?