ought to refilter
Regular verb: refilter - refiltered- refiltered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to refilter
you ought to refilter
he ought to refilter
we ought to refilter
you ought to refilter
they ought to refilter 	I ought to be refiltering
you ought to be refiltering
he ought to be refiltering
we ought to be refiltering
you ought to be refiltering
they ought to be refiltering	I ought to have refiltered
you ought to have refiltered
he ought to have refiltered
we ought to have refiltered
you ought to have refiltered
they ought to have refiltered	I ought to have been refiltering
you ought to have been refiltering
he ought to have been refiltering
we ought to have been refiltering
you ought to have been refiltering
they ought to have been refiltering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to refilter
you oughtn't to refilter
he oughtn't to refilter
we oughtn't to refilter
you oughtn't to refilter
they oughtn't to refilter 	I oughtn't to be refiltering
you oughtn't to be refiltering
he oughtn't to be refiltering
we oughtn't to be refiltering
you oughtn't to be refiltering
they oughtn't to be refiltering	I oughtn't to have refiltered
you oughtn't to have refiltered
he oughtn't to have refiltered
we oughtn't to have refiltered
you oughtn't to have refiltered
they oughtn't to have refiltered	I oughtn't to have been refiltering
you oughtn't to have been refiltering
he oughtn't to have been refiltering
we oughtn't to have been refiltering
you oughtn't to have been refiltering
they oughtn't to have been refiltering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I refilter?
ought to you refilter?
ought to he refilter?
ought to we refilter?
ought to you refilter?
ought to they refilter? 	ought to I be refiltering?
ought to you be refiltering?
ought to he be refiltering?
ought to we be refiltering?
ought to you be refiltering?
ought to they be refiltering? 	ought to I have refiltered?
ought to you have refiltered?
ought to he have refiltered?
ought to we have refiltered?
ought to you have refiltered?
ought to they have refiltered? 	ought to I have been refiltering?
ought to you have been refiltering?
ought to he have been refiltering?
ought to we have been refiltering?
ought to you have been refiltering?
ought to they have been refiltering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to refilter?
oughtn't you to refilter?
oughtn't he to refilter?
oughtn't we to refilter?
oughtn't you to refilter?
oughtn't they to refilter? 	oughtn't I to be refiltering?
oughtn't you to be refiltering?
oughtn't he to be refiltering?
oughtn't we to be refiltering?
oughtn't you to be refiltering?
oughtn't they to be refiltering? 	oughtn't I to have refiltered?
oughtn't you to have refiltered?
oughtn't he to have refiltered?
oughtn't we to have refiltered?
oughtn't you to have refiltered?
oughtn't they to have refiltered? 	oughtn't I to have been refiltering?
oughtn't you to have been refiltering?
oughtn't he to have been refiltering?
oughtn't we to have been refiltering?
oughtn't you to have been refiltering?
oughtn't they to have been refiltering?