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