can checker
Verbe régulier : checker - checkered- checkered

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

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

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

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