ought to persist
Regular verb: persist - persisted- persisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to persist
you ought to persist
she ought to persist
we ought to persist
you ought to persist
they ought to persist 	I ought to be persisting
you ought to be persisting
she ought to be persisting
we ought to be persisting
you ought to be persisting
they ought to be persisting	I ought to have persisted
you ought to have persisted
she ought to have persisted
we ought to have persisted
you ought to have persisted
they ought to have persisted	I ought to have been persisting
you ought to have been persisting
she ought to have been persisting
we ought to have been persisting
you ought to have been persisting
they ought to have been persisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to persist
you oughtn't to persist
she oughtn't to persist
we oughtn't to persist
you oughtn't to persist
they oughtn't to persist 	I oughtn't to be persisting
you oughtn't to be persisting
she oughtn't to be persisting
we oughtn't to be persisting
you oughtn't to be persisting
they oughtn't to be persisting	I oughtn't to have persisted
you oughtn't to have persisted
she oughtn't to have persisted
we oughtn't to have persisted
you oughtn't to have persisted
they oughtn't to have persisted	I oughtn't to have been persisting
you oughtn't to have been persisting
she oughtn't to have been persisting
we oughtn't to have been persisting
you oughtn't to have been persisting
they oughtn't to have been persisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I persist?
ought to you persist?
ought to she persist?
ought to we persist?
ought to you persist?
ought to they persist? 	ought to I be persisting?
ought to you be persisting?
ought to she be persisting?
ought to we be persisting?
ought to you be persisting?
ought to they be persisting? 	ought to I have persisted?
ought to you have persisted?
ought to she have persisted?
ought to we have persisted?
ought to you have persisted?
ought to they have persisted? 	ought to I have been persisting?
ought to you have been persisting?
ought to she have been persisting?
ought to we have been persisting?
ought to you have been persisting?
ought to they have been persisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to persist?
oughtn't you to persist?
oughtn't she to persist?
oughtn't we to persist?
oughtn't you to persist?
oughtn't they to persist? 	oughtn't I to be persisting?
oughtn't you to be persisting?
oughtn't she to be persisting?
oughtn't we to be persisting?
oughtn't you to be persisting?
oughtn't they to be persisting? 	oughtn't I to have persisted?
oughtn't you to have persisted?
oughtn't she to have persisted?
oughtn't we to have persisted?
oughtn't you to have persisted?
oughtn't they to have persisted? 	oughtn't I to have been persisting?
oughtn't you to have been persisting?
oughtn't she to have been persisting?
oughtn't we to have been persisting?
oughtn't you to have been persisting?
oughtn't they to have been persisting?