ought to decelerate
Regular verb: decelerate - decelerated- decelerated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to decelerate
you ought to decelerate
he ought to decelerate
we ought to decelerate
you ought to decelerate
they ought to decelerate 	I ought to be decelerating
you ought to be decelerating
he ought to be decelerating
we ought to be decelerating
you ought to be decelerating
they ought to be decelerating	I ought to have decelerated
you ought to have decelerated
he ought to have decelerated
we ought to have decelerated
you ought to have decelerated
they ought to have decelerated	I ought to have been decelerating
you ought to have been decelerating
he ought to have been decelerating
we ought to have been decelerating
you ought to have been decelerating
they ought to have been decelerating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to decelerate
you oughtn't to decelerate
he oughtn't to decelerate
we oughtn't to decelerate
you oughtn't to decelerate
they oughtn't to decelerate 	I oughtn't to be decelerating
you oughtn't to be decelerating
he oughtn't to be decelerating
we oughtn't to be decelerating
you oughtn't to be decelerating
they oughtn't to be decelerating	I oughtn't to have decelerated
you oughtn't to have decelerated
he oughtn't to have decelerated
we oughtn't to have decelerated
you oughtn't to have decelerated
they oughtn't to have decelerated	I oughtn't to have been decelerating
you oughtn't to have been decelerating
he oughtn't to have been decelerating
we oughtn't to have been decelerating
you oughtn't to have been decelerating
they oughtn't to have been decelerating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I decelerate?
ought to you decelerate?
ought to he decelerate?
ought to we decelerate?
ought to you decelerate?
ought to they decelerate? 	ought to I be decelerating?
ought to you be decelerating?
ought to he be decelerating?
ought to we be decelerating?
ought to you be decelerating?
ought to they be decelerating? 	ought to I have decelerated?
ought to you have decelerated?
ought to he have decelerated?
ought to we have decelerated?
ought to you have decelerated?
ought to they have decelerated? 	ought to I have been decelerating?
ought to you have been decelerating?
ought to he have been decelerating?
ought to we have been decelerating?
ought to you have been decelerating?
ought to they have been decelerating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to decelerate?
oughtn't you to decelerate?
oughtn't he to decelerate?
oughtn't we to decelerate?
oughtn't you to decelerate?
oughtn't they to decelerate? 	oughtn't I to be decelerating?
oughtn't you to be decelerating?
oughtn't he to be decelerating?
oughtn't we to be decelerating?
oughtn't you to be decelerating?
oughtn't they to be decelerating? 	oughtn't I to have decelerated?
oughtn't you to have decelerated?
oughtn't he to have decelerated?
oughtn't we to have decelerated?
oughtn't you to have decelerated?
oughtn't they to have decelerated? 	oughtn't I to have been decelerating?
oughtn't you to have been decelerating?
oughtn't he to have been decelerating?
oughtn't we to have been decelerating?
oughtn't you to have been decelerating?
oughtn't they to have been decelerating?