English verb conjugation
CAN GRIMACE

Regular verb: grimace - grimaced - grimaced

Affirmation

Simple form	V-ing form
I can grimace you can grimace he can grimace we can grimace you can grimace they can grimace	I can be grimacing you can be grimacing he can be grimacing we can be grimacing you can be grimacing they can be grimacing
Perfect	V-ing perfect
I can have grimaced you can have grimaced he can have grimaced we can have grimaced you can have grimaced they can have grimaced	I can have been grimacing you can have been grimacing he can have been grimacing we can have been grimacing you can have been grimacing they can have been grimacing

Negation

Simple form	V-ing form
I can't grimace you can't grimace he can't grimace we can't grimace you can't grimace they can't grimace	I can't be grimacing you can't be grimacing he can't be grimacing we can't be grimacing you can't be grimacing they can't be grimacing
Perfect	V-ing perfect
I can't have grimaced you can't have grimaced he can't have grimaced we can't have grimaced you can't have grimaced they can't have grimaced	I can't have been grimacing you can't have been grimacing he can't have been grimacing we can't have been grimacing you can't have been grimacing they can't have been grimacing

Interrogative form

Simple form	V-ing form
can I grimace? can you grimace? can he grimace? can we grimace? can you grimace? can they grimace?	can I be grimacing? can you be grimacing? can he be grimacing? can we be grimacing? can you be grimacing? can they be grimacing?
Perfect	V-ing perfect
can I have grimaced? can you have grimaced? can he have grimaced? can we have grimaced? can you have grimaced? can they have grimaced?	can I have been grimacing? can you have been grimacing? can he have been grimacing? can we have been grimacing? can you have been grimacing? can they have been grimacing?

Interro-negative form

Simple form	V-ing form
can't I grimace? can't you grimace? can't he grimace? can't we grimace? can't you grimace? can't they grimace?	can't I be grimacing? can't you be grimacing? can't he be grimacing? can't we be grimacing? can't you be grimacing? can't they be grimacing?
Perfect	V-ing perfect
can't I have grimaced? can't you have grimaced? can't he have grimaced? can't we have grimaced? can't you have grimaced? can't they have grimaced?	can't I have been grimacing? can't you have been grimacing? can't he have been grimacing? can't we have been grimacing? can't you have been grimacing? can't they have been grimacing?