I should grimace you should grimace he should grimace we should grimace you should grimace they should grimace
V-ing form
I should be grimacing you should be grimacing he should be grimacing we should be grimacing you should be grimacing they should be grimacing
Perfect
I should have grimaced you should have grimaced he should have grimaced we should have grimaced you should have grimaced they should have grimaced
V-ing perfect
I should have been grimacing you should have been grimacing he should have been grimacing we should have been grimacing you should have been grimacing they should have been grimacing
Negation
Simple form
I should not grimace you should not grimace he should not grimace we should not grimace you should not grimace they should not grimace
V-ing form
I should not be grimacing you should not be grimacing he should not be grimacing we should not be grimacing you should not be grimacing they should not be grimacing
Perfect
I should not have grimaced you should not have grimaced he should not have grimaced we should not have grimaced you should not have grimaced they should not have grimaced
V-ing perfect
I should not have been grimacing you should not have been grimacing he should not have been grimacing we should not have been grimacing you should not have been grimacing they should not have been grimacing
Interrogative form
Simple form
should I grimace? should you grimace? should he grimace? should we grimace? should you grimace? should they grimace?
V-ing form
should I be grimacing? should you be grimacing? should he be grimacing? should we be grimacing? should you be grimacing? should they be grimacing?
Perfect
should I have grimaced? should you have grimaced? should he have grimaced? should we have grimaced? should you have grimaced? should they have grimaced?
V-ing perfect
should I have been grimacing? should you have been grimacing? should he have been grimacing? should we have been grimacing? should you have been grimacing? should they have been grimacing?
Interro-negative form
Simple form
should I not grimace? should you not grimace? should he not grimace? should we not grimace? should you not grimace? should they not grimace?
V-ing form
should I not be grimacing? should you not be grimacing? should he not be grimacing? should we not be grimacing? should you not be grimacing? should they not be grimacing?
Perfect
should I not have grimaced? should you not have grimaced? should he not have grimaced? should we not have grimaced? should you not have grimaced? should they not have grimaced?
V-ing perfect
should I not have been grimacing? should you not have been grimacing? should he not have been grimacing? should we not have been grimacing? should you not have been grimacing? should they not have been grimacing?