English verb conjugation
COULD COPYRIGHT

Regular verb: copyright - copyrighted - copyrighted

Affirmation

Simple form	V-ing form
I could copyright you could copyright he could copyright we could copyright you could copyright they could copyright	I could be copyrighting you could be copyrighting he could be copyrighting we could be copyrighting you could be copyrighting they could be copyrighting
Perfect	V-ing perfect
I could have copyrighted you could have copyrighted he could have copyrighted we could have copyrighted you could have copyrighted they could have copyrighted	I could have been copyrighting you could have been copyrighting he could have been copyrighting we could have been copyrighting you could have been copyrighting they could have been copyrighting

Negation

Simple form	V-ing form
I could not copyright you could not copyright he could not copyright we could not copyright you could not copyright they could not copyright	I could not be copyrighting you could not be copyrighting he could not be copyrighting we could not be copyrighting you could not be copyrighting they could not be copyrighting
Perfect	V-ing perfect
I could not have copyrighted you could not have copyrighted he could not have copyrighted we could not have copyrighted you could not have copyrighted they could not have copyrighted	I could not have been copyrighting you could not have been copyrighting he could not have been copyrighting we could not have been copyrighting you could not have been copyrighting they could not have been copyrighting

Interrogative form

Simple form	V-ing form
could I copyright? could you copyright? could he copyright? could we copyright? could you copyright? could they copyright?	could I be copyrighting? could you be copyrighting? could he be copyrighting? could we be copyrighting? could you be copyrighting? could they be copyrighting?
Perfect	V-ing perfect
could I have copyrighted? could you have copyrighted? could he have copyrighted? could we have copyrighted? could you have copyrighted? could they have copyrighted?	could I have been copyrighting? could you have been copyrighting? could he have been copyrighting? could we have been copyrighting? could you have been copyrighting? could they have been copyrighting?

Interro-negative form

Simple form	V-ing form
could I not copyright? could you not copyright? could he not copyright? could we not copyright? could you not copyright? could they not copyright?	could I not be copyrighting? could you not be copyrighting? could he not be copyrighting? could we not be copyrighting? could you not be copyrighting? could they not be copyrighting?
Perfect	V-ing perfect
could I not have copyrighted? could you not have copyrighted? could he not have copyrighted? could we not have copyrighted? could you not have copyrighted? could they not have copyrighted?	could I not have been copyrighting? could you not have been copyrighting? could he not have been copyrighting? could we not have been copyrighting? could you not have been copyrighting? could they not have been copyrighting?