English verb conjugation
COULD PREOBTAIN

Regular verb: preobtain - preobtained - preobtained

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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