ought to filtrate
Regular verb: filtrate - filtrated- filtrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to filtrate
you ought to filtrate
he ought to filtrate
we ought to filtrate
you ought to filtrate
they ought to filtrate 	I ought to be filtrating
you ought to be filtrating
he ought to be filtrating
we ought to be filtrating
you ought to be filtrating
they ought to be filtrating	I ought to have filtrated
you ought to have filtrated
he ought to have filtrated
we ought to have filtrated
you ought to have filtrated
they ought to have filtrated	I ought to have been filtrating
you ought to have been filtrating
he ought to have been filtrating
we ought to have been filtrating
you ought to have been filtrating
they ought to have been filtrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to filtrate
you oughtn't to filtrate
he oughtn't to filtrate
we oughtn't to filtrate
you oughtn't to filtrate
they oughtn't to filtrate 	I oughtn't to be filtrating
you oughtn't to be filtrating
he oughtn't to be filtrating
we oughtn't to be filtrating
you oughtn't to be filtrating
they oughtn't to be filtrating	I oughtn't to have filtrated
you oughtn't to have filtrated
he oughtn't to have filtrated
we oughtn't to have filtrated
you oughtn't to have filtrated
they oughtn't to have filtrated	I oughtn't to have been filtrating
you oughtn't to have been filtrating
he oughtn't to have been filtrating
we oughtn't to have been filtrating
you oughtn't to have been filtrating
they oughtn't to have been filtrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I filtrate?
ought to you filtrate?
ought to he filtrate?
ought to we filtrate?
ought to you filtrate?
ought to they filtrate? 	ought to I be filtrating?
ought to you be filtrating?
ought to he be filtrating?
ought to we be filtrating?
ought to you be filtrating?
ought to they be filtrating? 	ought to I have filtrated?
ought to you have filtrated?
ought to he have filtrated?
ought to we have filtrated?
ought to you have filtrated?
ought to they have filtrated? 	ought to I have been filtrating?
ought to you have been filtrating?
ought to he have been filtrating?
ought to we have been filtrating?
ought to you have been filtrating?
ought to they have been filtrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to filtrate?
oughtn't you to filtrate?
oughtn't he to filtrate?
oughtn't we to filtrate?
oughtn't you to filtrate?
oughtn't they to filtrate? 	oughtn't I to be filtrating?
oughtn't you to be filtrating?
oughtn't he to be filtrating?
oughtn't we to be filtrating?
oughtn't you to be filtrating?
oughtn't they to be filtrating? 	oughtn't I to have filtrated?
oughtn't you to have filtrated?
oughtn't he to have filtrated?
oughtn't we to have filtrated?
oughtn't you to have filtrated?
oughtn't they to have filtrated? 	oughtn't I to have been filtrating?
oughtn't you to have been filtrating?
oughtn't he to have been filtrating?
oughtn't we to have been filtrating?
oughtn't you to have been filtrating?
oughtn't they to have been filtrating?