could bull bull
Verbe régulier : bull bull - bull bulled- bull bulled

, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could bull bull
you could bull bull
he could bull bull
we could bull bull
you could bull bull
they could bull bull 	I could be bull bulling
you could be bull bulling
he could be bull bulling
we could be bull bulling
you could be bull bulling
they could be bull bulling	I could have bull bulled
you could have bull bulled
he could have bull bulled
we could have bull bulled
you could have bull bulled
they could have bull bulled	I could have been bull bulling
you could have been bull bulling
he could have been bull bulling
we could have been bull bulling
you could have been bull bulling
they could have been bull bulling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not bull bull
you could not bull bull
he could not bull bull
we could not bull bull
you could not bull bull
they could not bull bull 	I could not be bull bulling
you could not be bull bulling
he could not be bull bulling
we could not be bull bulling
you could not be bull bulling
they could not be bull bulling	I could not have bull bulled
you could not have bull bulled
he could not have bull bulled
we could not have bull bulled
you could not have bull bulled
they could not have bull bulled	I could not have been bull bulling
you could not have been bull bulling
he could not have been bull bulling
we could not have been bull bulling
you could not have been bull bulling
they could not have been bull bulling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I bull bull?
could you bull bull?
could he bull bull?
could we bull bull?
could you bull bull?
could they bull bull? 	could I be bull bulling?
could you be bull bulling?
could he be bull bulling?
could we be bull bulling?
could you be bull bulling?
could they be bull bulling? 	could I have bull bulled?
could you have bull bulled?
could he have bull bulled?
could we have bull bulled?
could you have bull bulled?
could they have bull bulled? 	could I have been bull bulling?
could you have been bull bulling?
could he have been bull bulling?
could we have been bull bulling?
could you have been bull bulling?
could they have been bull bulling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not bull bull?
could you not bull bull?
could he not bull bull?
could we not bull bull?
could you not bull bull?
could they not bull bull? 	could I not be bull bulling?
could you not be bull bulling?
could he not be bull bulling?
could we not be bull bulling?
could you not be bull bulling?
could they not be bull bulling? 	could I not have bull bulled?
could you not have bull bulled?
could he not have bull bulled?
could we not have bull bulled?
could you not have bull bulled?
could they not have bull bulled? 	could I not have been bull bulling?
could you not have been bull bulling?
could he not have been bull bulling?
could we not have been bull bulling?
could you not have been bull bulling?
could they not have been bull bulling?