can knuckle
Verbe régulier : knuckle - knuckled- knuckled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can knuckle
you can knuckle
he can knuckle
we can knuckle
you can knuckle
they can knuckle 	I can be knuckling
you can be knuckling
he can be knuckling
we can be knuckling
you can be knuckling
they can be knuckling	I can have knuckled
you can have knuckled
he can have knuckled
we can have knuckled
you can have knuckled
they can have knuckled	I can have been knuckling
you can have been knuckling
he can have been knuckling
we can have been knuckling
you can have been knuckling
they can have been knuckling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot knuckle
you cannot knuckle
he cannot knuckle
we cannot knuckle
you cannot knuckle
they cannot knuckle 	I cannot be knuckling
you cannot be knuckling
he cannot be knuckling
we cannot be knuckling
you cannot be knuckling
they cannot be knuckling	I cannot have knuckled
you cannot have knuckled
he cannot have knuckled
we cannot have knuckled
you cannot have knuckled
they cannot have knuckled	I cannot have been knuckling
you cannot have been knuckling
he cannot have been knuckling
we cannot have been knuckling
you cannot have been knuckling
they cannot have been knuckling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I knuckle?
can you knuckle?
can he knuckle?
can we knuckle?
can you knuckle?
can they knuckle? 	can I be knuckling?
can you be knuckling?
can he be knuckling?
can we be knuckling?
can you be knuckling?
can they be knuckling? 	can I have knuckled?
can you have knuckled?
can he have knuckled?
can we have knuckled?
can you have knuckled?
can they have knuckled? 	can I have been knuckling?
can you have been knuckling?
can he have been knuckling?
can we have been knuckling?
can you have been knuckling?
can they have been knuckling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not knuckle?
can you not knuckle?
can he not knuckle?
can we not knuckle?
can you not knuckle?
can they not knuckle? 	can I not be knuckling?
can you not be knuckling?
can he not be knuckling?
can we not be knuckling?
can you not be knuckling?
can they not be knuckling? 	can I not have knuckled?
can you not have knuckled?
can he not have knuckled?
can we not have knuckled?
can you not have knuckled?
can they not have knuckled? 	can I not have been knuckling?
can you not have been knuckling?
can he not have been knuckling?
can we not have been knuckling?
can you not have been knuckling?
can they not have been knuckling?