English verb conjugation
OUGHT TO PREOBTAIN

Regular verb: preobtain - preobtained - preobtained

Affirmation

Simple form	V-ing form
I ought to preobtain you ought to preobtain he ought to preobtain we ought to preobtain you ought to preobtain they ought to preobtain	I ought to be preobtaining you ought to be preobtaining he ought to be preobtaining we ought to be preobtaining you ought to be preobtaining they ought to be preobtaining
Perfect	V-ing perfect
I ought to have preobtained you ought to have preobtained he ought to have preobtained we ought to have preobtained you ought to have preobtained they ought to have preobtained	I ought to have been preobtaining you ought to have been preobtaining he ought to have been preobtaining we ought to have been preobtaining you ought to have been preobtaining they ought to have been preobtaining

Negation

Simple form	V-ing form
I ought not to preobtain you ought not to preobtain he ought not to preobtain we ought not to preobtain you ought not to preobtain they ought not to preobtain	I ought not to preobtaining you ought not to preobtaining he ought not to preobtaining we ought not to preobtaining you ought not to preobtaining they ought not to preobtaining
Perfect	V-ing perfect
I ought not to have preobtained you ought not to have preobtained he ought not to have preobtained we ought not to have preobtained you ought not to have preobtained they ought not to have preobtained	I ought not to have been preobtaining you ought not to have been preobtaining he ought not to have been preobtaining we ought not to have been preobtaining you ought not to have been preobtaining they ought not to have been preobtaining

Interrogative form

Simple form	V-ing form
ought to I preobtain? ought to you preobtain? ought to he preobtain? ought to we preobtain? ought to you preobtain? ought to they preobtain?	ought to I be preobtaining? ought to you be preobtaining? ought to he be preobtaining? ought to we be preobtaining? ought to you be preobtaining? ought to they be preobtaining?
Perfect	V-ing perfect
ought to I have preobtained? ought to you have preobtained? ought to he have preobtained? ought to we have preobtained? ought to you have preobtained? ought to they have preobtained?	ought to I have been preobtaining? ought to you have been preobtaining? ought to he have been preobtaining? ought to we have been preobtaining? ought to you have been preobtaining? ought to they have been preobtaining?

Interro-negative form

Simple form	V-ing form
ought I not to preobtain? ought you not to preobtain? ought he not to preobtain? ought we not to preobtain? ought you not to preobtain? ought they not to preobtain?	ought I not to be preobtaining? ought you not to be preobtaining? ought he not to be preobtaining? ought we not to be preobtaining? ought you not to be preobtaining? ought they not to be preobtaining?
Perfect	V-ing perfect
ought I not to have preobtained? ought you not to have preobtained? ought he not to have preobtained? ought we not to have preobtained? ought you not to have preobtained? ought they not to have preobtained?	ought I not to have been preobtaining? ought you not to have been preobtaining? ought he not to have been preobtaining? ought we not to have been preobtaining? ought you not to have been preobtaining? ought they not to have been preobtaining?