must checker
Verbe régulier : checker - checkered- checkered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must checker
you must checker
she must checker
we must checker
you must checker
they must checker 	I must be checkering
you must be checkering
she must be checkering
we must be checkering
you must be checkering
they must be checkering	I must have checkered
you must have checkered
she must have checkered
we must have checkered
you must have checkered
they must have checkered	I must have been checkering
you must have been checkering
she must have been checkering
we must have been checkering
you must have been checkering
they must have been checkering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not checker
you must not checker
she must not checker
we must not checker
you must not checker
they must not checker 	I must not be checkering
you must not be checkering
she must not be checkering
we must not be checkering
you must not be checkering
they must not be checkering	I must not have checkered
you must not have checkered
she must not have checkered
we must not have checkered
you must not have checkered
they must not have checkered	I must not have been checkering
you must not have been checkering
she must not have been checkering
we must not have been checkering
you must not have been checkering
they must not have been checkering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I checker?
must you checker?
must she checker?
must we checker?
must you checker?
must they checker? 	must I be checkering?
must you be checkering?
must she be checkering?
must we be checkering?
must you be checkering?
must they be checkering? 	must I have checkered?
must you have checkered?
must she have checkered?
must we have checkered?
must you have checkered?
must they have checkered? 	must I have been checkering?
must you have been checkering?
must she have been checkering?
must we have been checkering?
must you have been checkering?
must they have been checkering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not checker?
must you not checker?
must she not checker?
must we not checker?
must you not checker?
must they not checker? 	must I not be checkering?
must you not be checkering?
must she not be checkering?
must we not be checkering?
must you not be checkering?
must they not be checkering? 	must I not have checkered?
must you not have checkered?
must she not have checkered?
must we not have checkered?
must you not have checkered?
must they not have checkered? 	must I not have been checkering?
must you not have been checkering?
must she not have been checkering?
must we not have been checkering?
must you not have been checkering?
must they not have been checkering?