can grate
Regular verb: grate - grated- grated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can grate
you can grate
he can grate
we can grate
you can grate
they can grate 	I can be grating
you can be grating
he can be grating
we can be grating
you can be grating
they can be grating	I can have grated
you can have grated
he can have grated
we can have grated
you can have grated
they can have grated	I can have been grating
you can have been grating
he can have been grating
we can have been grating
you can have been grating
they can have been grating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't grate
you can't grate
he can't grate
we can't grate
you can't grate
they can't grate 	I can't be grating
you can't be grating
he can't be grating
we can't be grating
you can't be grating
they can't be grating	I can't have grated
you can't have grated
he can't have grated
we can't have grated
you can't have grated
they can't have grated	I can't have been grating
you can't have been grating
he can't have been grating
we can't have been grating
you can't have been grating
they can't have been grating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I grate?
can you grate?
can he grate?
can we grate?
can you grate?
can they grate? 	can I be grating?
can you be grating?
can he be grating?
can we be grating?
can you be grating?
can they be grating? 	can I have grated?
can you have grated?
can he have grated?
can we have grated?
can you have grated?
can they have grated? 	can I have been grating?
can you have been grating?
can he have been grating?
can we have been grating?
can you have been grating?
can they have been grating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I grate?
can't you grate?
can't he grate?
can't we grate?
can't you grate?
can't they grate? 	can't I be grating?
can't you be grating?
can't he be grating?
can't we be grating?
can't you be grating?
can't they be grating? 	can't I have grated?
can't you have grated?
can't he have grated?
can't we have grated?
can't you have grated?
can't they have grated? 	can't I have been grating?
can't you have been grating?
can't he have been grating?
can't we have been grating?
can't you have been grating?
can't they have been grating?