English verb conjugation
SHOULD CHECKER

Regular verb: checker - checkered - checkered

Affirmation

Simple form	V-ing form
I should checker you should checker he should checker we should checker you should checker they should checker	I should be checkering you should be checkering he should be checkering we should be checkering you should be checkering they should be checkering
Perfect	V-ing perfect
I should have checkered you should have checkered he should have checkered we should have checkered you should have checkered they should have checkered	I should have been checkering you should have been checkering he should have been checkering we should have been checkering you should have been checkering they should have been checkering

Negation

Simple form	V-ing form
I should not checker you should not checker he should not checker we should not checker you should not checker they should not checker	I should not be checkering you should not be checkering he should not be checkering we should not be checkering you should not be checkering they should not be checkering
Perfect	V-ing perfect
I should not have checkered you should not have checkered he should not have checkered we should not have checkered you should not have checkered they should not have checkered	I should not have been checkering you should not have been checkering he should not have been checkering we should not have been checkering you should not have been checkering they should not have been checkering

Interrogative form

Simple form	V-ing form
should I checker? should you checker? should he checker? should we checker? should you checker? should they checker?	should I be checkering? should you be checkering? should he be checkering? should we be checkering? should you be checkering? should they be checkering?
Perfect	V-ing perfect
should I have checkered? should you have checkered? should he have checkered? should we have checkered? should you have checkered? should they have checkered?	should I have been checkering? should you have been checkering? should he have been checkering? should we have been checkering? should you have been checkering? should they have been checkering?

Interro-negative form

Simple form	V-ing form
should I not checker? should you not checker? should he not checker? should we not checker? should you not checker? should they not checker?	should I not be checkering? should you not be checkering? should he not be checkering? should we not be checkering? should you not be checkering? should they not be checkering?
Perfect	V-ing perfect
should I not have checkered? should you not have checkered? should he not have checkered? should we not have checkered? should you not have checkered? should they not have checkered?	should I not have been checkering? should you not have been checkering? should he not have been checkering? should we not have been checkering? should you not have been checkering? should they not have been checkering?