ought to lighten
Regular verb: lighten - lightened- lightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to lighten
you ought to lighten
she ought to lighten
we ought to lighten
you ought to lighten
they ought to lighten 	I ought to be lightening
you ought to be lightening
she ought to be lightening
we ought to be lightening
you ought to be lightening
they ought to be lightening	I ought to have lightened
you ought to have lightened
she ought to have lightened
we ought to have lightened
you ought to have lightened
they ought to have lightened	I ought to have been lightening
you ought to have been lightening
she ought to have been lightening
we ought to have been lightening
you ought to have been lightening
they ought to have been lightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to lighten
you oughtn't to lighten
she oughtn't to lighten
we oughtn't to lighten
you oughtn't to lighten
they oughtn't to lighten 	I oughtn't to be lightening
you oughtn't to be lightening
she oughtn't to be lightening
we oughtn't to be lightening
you oughtn't to be lightening
they oughtn't to be lightening	I oughtn't to have lightened
you oughtn't to have lightened
she oughtn't to have lightened
we oughtn't to have lightened
you oughtn't to have lightened
they oughtn't to have lightened	I oughtn't to have been lightening
you oughtn't to have been lightening
she oughtn't to have been lightening
we oughtn't to have been lightening
you oughtn't to have been lightening
they oughtn't to have been lightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I lighten?
ought to you lighten?
ought to she lighten?
ought to we lighten?
ought to you lighten?
ought to they lighten? 	ought to I be lightening?
ought to you be lightening?
ought to she be lightening?
ought to we be lightening?
ought to you be lightening?
ought to they be lightening? 	ought to I have lightened?
ought to you have lightened?
ought to she have lightened?
ought to we have lightened?
ought to you have lightened?
ought to they have lightened? 	ought to I have been lightening?
ought to you have been lightening?
ought to she have been lightening?
ought to we have been lightening?
ought to you have been lightening?
ought to they have been lightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to lighten?
oughtn't you to lighten?
oughtn't she to lighten?
oughtn't we to lighten?
oughtn't you to lighten?
oughtn't they to lighten? 	oughtn't I to be lightening?
oughtn't you to be lightening?
oughtn't she to be lightening?
oughtn't we to be lightening?
oughtn't you to be lightening?
oughtn't they to be lightening? 	oughtn't I to have lightened?
oughtn't you to have lightened?
oughtn't she to have lightened?
oughtn't we to have lightened?
oughtn't you to have lightened?
oughtn't they to have lightened? 	oughtn't I to have been lightening?
oughtn't you to have been lightening?
oughtn't she to have been lightening?
oughtn't we to have been lightening?
oughtn't you to have been lightening?
oughtn't they to have been lightening?