English verb conjugation
COULD PAPER-TRAIN

Regular verb: paper-train - paper-trained - paper-trained

Affirmation

Simple form	V-ing form
I could paper-train you could paper-train he could paper-train we could paper-train you could paper-train they could paper-train	I could be paper-training you could be paper-training he could be paper-training we could be paper-training you could be paper-training they could be paper-training
Perfect	V-ing perfect
I could have paper-trained you could have paper-trained he could have paper-trained we could have paper-trained you could have paper-trained they could have paper-trained	I could have been paper-training you could have been paper-training he could have been paper-training we could have been paper-training you could have been paper-training they could have been paper-training

Negation

Simple form	V-ing form
I could not paper-train you could not paper-train he could not paper-train we could not paper-train you could not paper-train they could not paper-train	I could not be paper-training you could not be paper-training he could not be paper-training we could not be paper-training you could not be paper-training they could not be paper-training
Perfect	V-ing perfect
I could not have paper-trained you could not have paper-trained he could not have paper-trained we could not have paper-trained you could not have paper-trained they could not have paper-trained	I could not have been paper-training you could not have been paper-training he could not have been paper-training we could not have been paper-training you could not have been paper-training they could not have been paper-training

Interrogative form

Simple form	V-ing form
could I paper-train? could you paper-train? could he paper-train? could we paper-train? could you paper-train? could they paper-train?	could I be paper-training? could you be paper-training? could he be paper-training? could we be paper-training? could you be paper-training? could they be paper-training?
Perfect	V-ing perfect
could I have paper-trained? could you have paper-trained? could he have paper-trained? could we have paper-trained? could you have paper-trained? could they have paper-trained?	could I have been paper-training? could you have been paper-training? could he have been paper-training? could we have been paper-training? could you have been paper-training? could they have been paper-training?

Interro-negative form

Simple form	V-ing form
could I not paper-train? could you not paper-train? could he not paper-train? could we not paper-train? could you not paper-train? could they not paper-train?	could I not be paper-training? could you not be paper-training? could he not be paper-training? could we not be paper-training? could you not be paper-training? could they not be paper-training?
Perfect	V-ing perfect
could I not have paper-trained? could you not have paper-trained? could he not have paper-trained? could we not have paper-trained? could you not have paper-trained? could they not have paper-trained?	could I not have been paper-training? could you not have been paper-training? could he not have been paper-training? could we not have been paper-training? could you not have been paper-training? could they not have been paper-training?