ought to diminish
Regular verb: diminish - diminished- diminished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to diminish
you ought to diminish
he ought to diminish
we ought to diminish
you ought to diminish
they ought to diminish 	I ought to be diminishing
you ought to be diminishing
he ought to be diminishing
we ought to be diminishing
you ought to be diminishing
they ought to be diminishing	I ought to have diminished
you ought to have diminished
he ought to have diminished
we ought to have diminished
you ought to have diminished
they ought to have diminished	I ought to have been diminishing
you ought to have been diminishing
he ought to have been diminishing
we ought to have been diminishing
you ought to have been diminishing
they ought to have been diminishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to diminish
you oughtn't to diminish
he oughtn't to diminish
we oughtn't to diminish
you oughtn't to diminish
they oughtn't to diminish 	I oughtn't to be diminishing
you oughtn't to be diminishing
he oughtn't to be diminishing
we oughtn't to be diminishing
you oughtn't to be diminishing
they oughtn't to be diminishing	I oughtn't to have diminished
you oughtn't to have diminished
he oughtn't to have diminished
we oughtn't to have diminished
you oughtn't to have diminished
they oughtn't to have diminished	I oughtn't to have been diminishing
you oughtn't to have been diminishing
he oughtn't to have been diminishing
we oughtn't to have been diminishing
you oughtn't to have been diminishing
they oughtn't to have been diminishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I diminish?
ought to you diminish?
ought to he diminish?
ought to we diminish?
ought to you diminish?
ought to they diminish? 	ought to I be diminishing?
ought to you be diminishing?
ought to he be diminishing?
ought to we be diminishing?
ought to you be diminishing?
ought to they be diminishing? 	ought to I have diminished?
ought to you have diminished?
ought to he have diminished?
ought to we have diminished?
ought to you have diminished?
ought to they have diminished? 	ought to I have been diminishing?
ought to you have been diminishing?
ought to he have been diminishing?
ought to we have been diminishing?
ought to you have been diminishing?
ought to they have been diminishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to diminish?
oughtn't you to diminish?
oughtn't he to diminish?
oughtn't we to diminish?
oughtn't you to diminish?
oughtn't they to diminish? 	oughtn't I to be diminishing?
oughtn't you to be diminishing?
oughtn't he to be diminishing?
oughtn't we to be diminishing?
oughtn't you to be diminishing?
oughtn't they to be diminishing? 	oughtn't I to have diminished?
oughtn't you to have diminished?
oughtn't he to have diminished?
oughtn't we to have diminished?
oughtn't you to have diminished?
oughtn't they to have diminished? 	oughtn't I to have been diminishing?
oughtn't you to have been diminishing?
oughtn't he to have been diminishing?
oughtn't we to have been diminishing?
oughtn't you to have been diminishing?
oughtn't they to have been diminishing?