ought to sinter
Regular verb: sinter - sintered- sintered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sinter
you ought to sinter
he ought to sinter
we ought to sinter
you ought to sinter
they ought to sinter 	I ought to be sintering
you ought to be sintering
he ought to be sintering
we ought to be sintering
you ought to be sintering
they ought to be sintering	I ought to have sintered
you ought to have sintered
he ought to have sintered
we ought to have sintered
you ought to have sintered
they ought to have sintered	I ought to have been sintering
you ought to have been sintering
he ought to have been sintering
we ought to have been sintering
you ought to have been sintering
they ought to have been sintering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sinter
you oughtn't to sinter
he oughtn't to sinter
we oughtn't to sinter
you oughtn't to sinter
they oughtn't to sinter 	I oughtn't to be sintering
you oughtn't to be sintering
he oughtn't to be sintering
we oughtn't to be sintering
you oughtn't to be sintering
they oughtn't to be sintering	I oughtn't to have sintered
you oughtn't to have sintered
he oughtn't to have sintered
we oughtn't to have sintered
you oughtn't to have sintered
they oughtn't to have sintered	I oughtn't to have been sintering
you oughtn't to have been sintering
he oughtn't to have been sintering
we oughtn't to have been sintering
you oughtn't to have been sintering
they oughtn't to have been sintering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sinter?
ought to you sinter?
ought to he sinter?
ought to we sinter?
ought to you sinter?
ought to they sinter? 	ought to I be sintering?
ought to you be sintering?
ought to he be sintering?
ought to we be sintering?
ought to you be sintering?
ought to they be sintering? 	ought to I have sintered?
ought to you have sintered?
ought to he have sintered?
ought to we have sintered?
ought to you have sintered?
ought to they have sintered? 	ought to I have been sintering?
ought to you have been sintering?
ought to he have been sintering?
ought to we have been sintering?
ought to you have been sintering?
ought to they have been sintering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sinter?
oughtn't you to sinter?
oughtn't he to sinter?
oughtn't we to sinter?
oughtn't you to sinter?
oughtn't they to sinter? 	oughtn't I to be sintering?
oughtn't you to be sintering?
oughtn't he to be sintering?
oughtn't we to be sintering?
oughtn't you to be sintering?
oughtn't they to be sintering? 	oughtn't I to have sintered?
oughtn't you to have sintered?
oughtn't he to have sintered?
oughtn't we to have sintered?
oughtn't you to have sintered?
oughtn't they to have sintered? 	oughtn't I to have been sintering?
oughtn't you to have been sintering?
oughtn't he to have been sintering?
oughtn't we to have been sintering?
oughtn't you to have been sintering?
oughtn't they to have been sintering?