English verb conjugation
COULD INVOKE

Regular verb: invoke - invoked - invoked

Affirmation

Simple form	V-ing form
I could invoke you could invoke she could invoke we could invoke you could invoke they could invoke	I could be invoking you could be invoking she could be invoking we could be invoking you could be invoking they could be invoking
Perfect	V-ing perfect
I could have invoked you could have invoked she could have invoked we could have invoked you could have invoked they could have invoked	I could have been invoking you could have been invoking she could have been invoking we could have been invoking you could have been invoking they could have been invoking

Negation

Simple form	V-ing form
I could not invoke you could not invoke she could not invoke we could not invoke you could not invoke they could not invoke	I could not be invoking you could not be invoking she could not be invoking we could not be invoking you could not be invoking they could not be invoking
Perfect	V-ing perfect
I could not have invoked you could not have invoked she could not have invoked we could not have invoked you could not have invoked they could not have invoked	I could not have been invoking you could not have been invoking she could not have been invoking we could not have been invoking you could not have been invoking they could not have been invoking

Interrogative form

Simple form	V-ing form
could I invoke? could you invoke? could she invoke? could we invoke? could you invoke? could they invoke?	could I be invoking? could you be invoking? could she be invoking? could we be invoking? could you be invoking? could they be invoking?
Perfect	V-ing perfect
could I have invoked? could you have invoked? could she have invoked? could we have invoked? could you have invoked? could they have invoked?	could I have been invoking? could you have been invoking? could she have been invoking? could we have been invoking? could you have been invoking? could they have been invoking?

Interro-negative form

Simple form	V-ing form
could I not invoke? could you not invoke? could she not invoke? could we not invoke? could you not invoke? could they not invoke?	could I not be invoking? could you not be invoking? could she not be invoking? could we not be invoking? could you not be invoking? could they not be invoking?
Perfect	V-ing perfect
could I not have invoked? could you not have invoked? could she not have invoked? could we not have invoked? could you not have invoked? could they not have invoked?	could I not have been invoking? could you not have been invoking? could she not have been invoking? could we not have been invoking? could you not have been invoking? could they not have been invoking?