must 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 must bull bull
you must bull bull
he must bull bull
we must bull bull
you must bull bull
they must bull bull 	I must be bull bulling
you must be bull bulling
he must be bull bulling
we must be bull bulling
you must be bull bulling
they must be bull bulling	I must have bull bulled
you must have bull bulled
he must have bull bulled
we must have bull bulled
you must have bull bulled
they must have bull bulled	I must have been bull bulling
you must have been bull bulling
he must have been bull bulling
we must have been bull bulling
you must have been bull bulling
they must have been bull bulling	

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

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

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