English verb conjugation
SHOULD INVOKE

Regular verb: invoke - invoked - invoked

Affirmation

Simple form	V-ing form
I'd invoke you'd invoke he'd invoke we'd invoke you'd invoke they'd invoke	I'd be invoking you'd be invoking he'd be invoking we'd be invoking you'd be invoking they'd be invoking
Perfect	V-ing perfect
I should've invoked you should've invoked he should've invoked we should've invoked you should've invoked they should've invoked	I should've been invoking you should've been invoking he should've been invoking we should've been invoking you should've been invoking they should've been invoking

Negation

Simple form	V-ing form
I shouldn't invoke you shouldn't invoke he shouldn't invoke we shouldn't invoke you shouldn't invoke they shouldn't invoke	I shouldn't be invoking you shouldn't be invoking he shouldn't be invoking we shouldn't be invoking you shouldn't be invoking they shouldn't be invoking
Perfect	V-ing perfect
I shouldn't have invoked you shouldn't have invoked he shouldn't have invoked we shouldn't have invoked you shouldn't have invoked they shouldn't have invoked	I shouldn't have been invoking you shouldn't have been invoking he shouldn't have been invoking we shouldn't have been invoking you shouldn't have been invoking they shouldn't have been invoking

Interrogative form

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

Interro-negative form

Simple form	V-ing form
shouldn't I invoke? shouldn't you invoke? shouldn't he invoke? shouldn't we invoke? shouldn't you invoke? shouldn't they invoke?	shouldn't I be invoking? shouldn't you be invoking? shouldn't he be invoking? shouldn't we be invoking? shouldn't you be invoking? shouldn't they be invoking?
Perfect	V-ing perfect
shouldn't I have invoked? shouldn't you have invoked? shouldn't he have invoked? shouldn't we have invoked? shouldn't you have invoked? shouldn't they have invoked?	shouldn't I have been invoking? shouldn't you have been invoking? shouldn't he have been invoking? shouldn't we have been invoking? shouldn't you have been invoking? shouldn't they have been invoking?