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 couldn't copyright you couldn't copyright he couldn't copyright we couldn't copyright you couldn't copyright they couldn't copyright	I couldn't be copyrighting you couldn't be copyrighting he couldn't be copyrighting we couldn't be copyrighting you couldn't be copyrighting they couldn't be copyrighting
Perfect	V-ing perfect
I couldn't have copyrighted you couldn't have copyrighted he couldn't have copyrighted we couldn't have copyrighted you couldn't have copyrighted they couldn't have copyrighted	I couldn't have been copyrighting you couldn't have been copyrighting he couldn't have been copyrighting we couldn't have been copyrighting you couldn't have been copyrighting they couldn't 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
couldn't I copyright? couldn't you copyright? couldn't he copyright? couldn't we copyright? couldn't you copyright? couldn't they copyright?	couldn't I be copyrighting? couldn't you be copyrighting? couldn't he be copyrighting? couldn't we be copyrighting? couldn't you be copyrighting? couldn't they be copyrighting?
Perfect	V-ing perfect
couldn't I have copyrighted? couldn't you have copyrighted? couldn't he have copyrighted? couldn't we have copyrighted? couldn't you have copyrighted? couldn't they have copyrighted?	couldn't I have been copyrighting? couldn't you have been copyrighting? couldn't he have been copyrighting? couldn't we have been copyrighting? couldn't you have been copyrighting? couldn't they have been copyrighting?