must grate
Verbe régulier : grate - grated- grated
Traduction française : râper - grincer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must grate
you must grate
he must grate
we must grate
you must grate
they must grate 	I must be grating
you must be grating
he must be grating
we must be grating
you must be grating
they must be grating	I must have grated
you must have grated
he must have grated
we must have grated
you must have grated
they must have grated	I must have been grating
you must have been grating
he must have been grating
we must have been grating
you must have been grating
they must have been grating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not grate
you must not grate
he must not grate
we must not grate
you must not grate
they must not grate 	I must not be grating
you must not be grating
he must not be grating
we must not be grating
you must not be grating
they must not be grating	I must not have grated
you must not have grated
he must not have grated
we must not have grated
you must not have grated
they must not have grated	I must not have been grating
you must not have been grating
he must not have been grating
we must not have been grating
you must not have been grating
they must not have been grating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I grate?
must you grate?
must he grate?
must we grate?
must you grate?
must they grate? 	must I be grating?
must you be grating?
must he be grating?
must we be grating?
must you be grating?
must they be grating? 	must I have grated?
must you have grated?
must he have grated?
must we have grated?
must you have grated?
must they have grated? 	must I have been grating?
must you have been grating?
must he have been grating?
must we have been grating?
must you have been grating?
must they have been grating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not grate?
must you not grate?
must he not grate?
must we not grate?
must you not grate?
must they not grate? 	must I not be grating?
must you not be grating?
must he not be grating?
must we not be grating?
must you not be grating?
must they not be grating? 	must I not have grated?
must you not have grated?
must he not have grated?
must we not have grated?
must you not have grated?
must they not have grated? 	must I not have been grating?
must you not have been grating?
must he not have been grating?
must we not have been grating?
must you not have been grating?
must they not have been grating?