ought to retain
Regular verb: retain - retained- retained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to retain
you ought to retain
he ought to retain
we ought to retain
you ought to retain
they ought to retain 	I ought to be retaining
you ought to be retaining
he ought to be retaining
we ought to be retaining
you ought to be retaining
they ought to be retaining	I ought to have retained
you ought to have retained
he ought to have retained
we ought to have retained
you ought to have retained
they ought to have retained	I ought to have been retaining
you ought to have been retaining
he ought to have been retaining
we ought to have been retaining
you ought to have been retaining
they ought to have been retaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to retain
you oughtn't to retain
he oughtn't to retain
we oughtn't to retain
you oughtn't to retain
they oughtn't to retain 	I oughtn't to be retaining
you oughtn't to be retaining
he oughtn't to be retaining
we oughtn't to be retaining
you oughtn't to be retaining
they oughtn't to be retaining	I oughtn't to have retained
you oughtn't to have retained
he oughtn't to have retained
we oughtn't to have retained
you oughtn't to have retained
they oughtn't to have retained	I oughtn't to have been retaining
you oughtn't to have been retaining
he oughtn't to have been retaining
we oughtn't to have been retaining
you oughtn't to have been retaining
they oughtn't to have been retaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I retain?
ought to you retain?
ought to he retain?
ought to we retain?
ought to you retain?
ought to they retain? 	ought to I be retaining?
ought to you be retaining?
ought to he be retaining?
ought to we be retaining?
ought to you be retaining?
ought to they be retaining? 	ought to I have retained?
ought to you have retained?
ought to he have retained?
ought to we have retained?
ought to you have retained?
ought to they have retained? 	ought to I have been retaining?
ought to you have been retaining?
ought to he have been retaining?
ought to we have been retaining?
ought to you have been retaining?
ought to they have been retaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to retain?
oughtn't you to retain?
oughtn't he to retain?
oughtn't we to retain?
oughtn't you to retain?
oughtn't they to retain? 	oughtn't I to be retaining?
oughtn't you to be retaining?
oughtn't he to be retaining?
oughtn't we to be retaining?
oughtn't you to be retaining?
oughtn't they to be retaining? 	oughtn't I to have retained?
oughtn't you to have retained?
oughtn't he to have retained?
oughtn't we to have retained?
oughtn't you to have retained?
oughtn't they to have retained? 	oughtn't I to have been retaining?
oughtn't you to have been retaining?
oughtn't he to have been retaining?
oughtn't we to have been retaining?
oughtn't you to have been retaining?
oughtn't they to have been retaining?