English verb conjugation
COULD PREINFORM

Regular verb: preinform - preinformed - preinformed

Affirmation

Simple form	V-ing form
I could preinform you could preinform he could preinform we could preinform you could preinform they could preinform	I could be preinforming you could be preinforming he could be preinforming we could be preinforming you could be preinforming they could be preinforming
Perfect	V-ing perfect
I could have preinformed you could have preinformed he could have preinformed we could have preinformed you could have preinformed they could have preinformed	I could have been preinforming you could have been preinforming he could have been preinforming we could have been preinforming you could have been preinforming they could have been preinforming

Negation

Simple form	V-ing form
I could not preinform you could not preinform he could not preinform we could not preinform you could not preinform they could not preinform	I could not be preinforming you could not be preinforming he could not be preinforming we could not be preinforming you could not be preinforming they could not be preinforming
Perfect	V-ing perfect
I could not have preinformed you could not have preinformed he could not have preinformed we could not have preinformed you could not have preinformed they could not have preinformed	I could not have been preinforming you could not have been preinforming he could not have been preinforming we could not have been preinforming you could not have been preinforming they could not have been preinforming

Interrogative form

Simple form	V-ing form
could I preinform? could you preinform? could he preinform? could we preinform? could you preinform? could they preinform?	could I be preinforming? could you be preinforming? could he be preinforming? could we be preinforming? could you be preinforming? could they be preinforming?
Perfect	V-ing perfect
could I have preinformed? could you have preinformed? could he have preinformed? could we have preinformed? could you have preinformed? could they have preinformed?	could I have been preinforming? could you have been preinforming? could he have been preinforming? could we have been preinforming? could you have been preinforming? could they have been preinforming?

Interro-negative form

Simple form	V-ing form
could I not preinform? could you not preinform? could he not preinform? could we not preinform? could you not preinform? could they not preinform?	could I not be preinforming? could you not be preinforming? could he not be preinforming? could we not be preinforming? could you not be preinforming? could they not be preinforming?
Perfect	V-ing perfect
could I not have preinformed? could you not have preinformed? could he not have preinformed? could we not have preinformed? could you not have preinformed? could they not have preinformed?	could I not have been preinforming? could you not have been preinforming? could he not have been preinforming? could we not have been preinforming? could you not have been preinforming? could they not have been preinforming?