I ought to filtrate you ought to filtrate he ought to filtrate we ought to filtrate you ought to filtrate they ought to filtrate
V-ing form
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
Perfect
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
V-ing perfect
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
I ought not to filtrate you ought not to filtrate he ought not to filtrate we ought not to filtrate you ought not to filtrate they ought not to filtrate
V-ing form
I ought not to filtrating you ought not to filtrating he ought not to filtrating we ought not to filtrating you ought not to filtrating they ought not to filtrating
Perfect
I ought not to have filtrated you ought not to have filtrated he ought not to have filtrated we ought not to have filtrated you ought not to have filtrated they ought not to have filtrated
V-ing perfect
I ought not to have been filtrating you ought not to have been filtrating he ought not to have been filtrating we ought not to have been filtrating you ought not to have been filtrating they ought not to have been filtrating
Interrogative form
Simple form
ought to I filtrate? ought to you filtrate? ought to he filtrate? ought to we filtrate? ought to you filtrate? ought to they filtrate?
V-ing form
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?
Perfect
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?
V-ing perfect
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
ought I not to filtrate? ought you not to filtrate? ought he not to filtrate? ought we not to filtrate? ought you not to filtrate? ought they not to filtrate?
V-ing form
ought I not to be filtrating? ought you not to be filtrating? ought he not to be filtrating? ought we not to be filtrating? ought you not to be filtrating? ought they not to be filtrating?
Perfect
ought I not to have filtrated? ought you not to have filtrated? ought he not to have filtrated? ought we not to have filtrated? ought you not to have filtrated? ought they not to have filtrated?
V-ing perfect
ought I not to have been filtrating? ought you not to have been filtrating? ought he not to have been filtrating? ought we not to have been filtrating? ought you not to have been filtrating? ought they not to have been filtrating?