English verb conjugation
COULD INCLUDE

Regular verb: include - included - included

Affirmation

Simple form	V-ing form
I could include you could include he could include we could include you could include they could include	I could be including you could be including he could be including we could be including you could be including they could be including
Perfect	V-ing perfect
I could have included you could have included he could have included we could have included you could have included they could have included	I could have been including you could have been including he could have been including we could have been including you could have been including they could have been including

Negation

Simple form	V-ing form
I could not include you could not include he could not include we could not include you could not include they could not include	I could not be including you could not be including he could not be including we could not be including you could not be including they could not be including
Perfect	V-ing perfect
I could not have included you could not have included he could not have included we could not have included you could not have included they could not have included	I could not have been including you could not have been including he could not have been including we could not have been including you could not have been including they could not have been including

Interrogative form

Simple form	V-ing form
could I include? could you include? could he include? could we include? could you include? could they include?	could I be including? could you be including? could he be including? could we be including? could you be including? could they be including?
Perfect	V-ing perfect
could I have included? could you have included? could he have included? could we have included? could you have included? could they have included?	could I have been including? could you have been including? could he have been including? could we have been including? could you have been including? could they have been including?

Interro-negative form

Simple form	V-ing form
could I not include? could you not include? could he not include? could we not include? could you not include? could they not include?	could I not be including? could you not be including? could he not be including? could we not be including? could you not be including? could they not be including?
Perfect	V-ing perfect
could I not have included? could you not have included? could he not have included? could we not have included? could you not have included? could they not have included?	could I not have been including? could you not have been including? could he not have been including? could we not have been including? could you not have been including? could they not have been including?