ought to retrieve
Regular verb: retrieve - retrieved- retrieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to retrieve
you ought to retrieve
she ought to retrieve
we ought to retrieve
you ought to retrieve
they ought to retrieve 	I ought to be retrieving
you ought to be retrieving
she ought to be retrieving
we ought to be retrieving
you ought to be retrieving
they ought to be retrieving	I ought to have retrieved
you ought to have retrieved
she ought to have retrieved
we ought to have retrieved
you ought to have retrieved
they ought to have retrieved	I ought to have been retrieving
you ought to have been retrieving
she ought to have been retrieving
we ought to have been retrieving
you ought to have been retrieving
they ought to have been retrieving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to retrieve
you oughtn't to retrieve
she oughtn't to retrieve
we oughtn't to retrieve
you oughtn't to retrieve
they oughtn't to retrieve 	I oughtn't to be retrieving
you oughtn't to be retrieving
she oughtn't to be retrieving
we oughtn't to be retrieving
you oughtn't to be retrieving
they oughtn't to be retrieving	I oughtn't to have retrieved
you oughtn't to have retrieved
she oughtn't to have retrieved
we oughtn't to have retrieved
you oughtn't to have retrieved
they oughtn't to have retrieved	I oughtn't to have been retrieving
you oughtn't to have been retrieving
she oughtn't to have been retrieving
we oughtn't to have been retrieving
you oughtn't to have been retrieving
they oughtn't to have been retrieving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I retrieve?
ought to you retrieve?
ought to she retrieve?
ought to we retrieve?
ought to you retrieve?
ought to they retrieve? 	ought to I be retrieving?
ought to you be retrieving?
ought to she be retrieving?
ought to we be retrieving?
ought to you be retrieving?
ought to they be retrieving? 	ought to I have retrieved?
ought to you have retrieved?
ought to she have retrieved?
ought to we have retrieved?
ought to you have retrieved?
ought to they have retrieved? 	ought to I have been retrieving?
ought to you have been retrieving?
ought to she have been retrieving?
ought to we have been retrieving?
ought to you have been retrieving?
ought to they have been retrieving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to retrieve?
oughtn't you to retrieve?
oughtn't she to retrieve?
oughtn't we to retrieve?
oughtn't you to retrieve?
oughtn't they to retrieve? 	oughtn't I to be retrieving?
oughtn't you to be retrieving?
oughtn't she to be retrieving?
oughtn't we to be retrieving?
oughtn't you to be retrieving?
oughtn't they to be retrieving? 	oughtn't I to have retrieved?
oughtn't you to have retrieved?
oughtn't she to have retrieved?
oughtn't we to have retrieved?
oughtn't you to have retrieved?
oughtn't they to have retrieved? 	oughtn't I to have been retrieving?
oughtn't you to have been retrieving?
oughtn't she to have been retrieving?
oughtn't we to have been retrieving?
oughtn't you to have been retrieving?
oughtn't they to have been retrieving?