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 mustn't bull bull
you mustn't bull bull
he mustn't bull bull
we mustn't bull bull
you mustn't bull bull
they mustn't bull bull 	I mustn't be bull bulling
you mustn't be bull bulling
he mustn't be bull bulling
we mustn't be bull bulling
you mustn't be bull bulling
they mustn't be bull bulling	I mustn't have bull bulled
you mustn't have bull bulled
he mustn't have bull bulled
we mustn't have bull bulled
you mustn't have bull bulled
they mustn't have bull bulled	I mustn't have been bull bulling
you mustn't have been bull bulling
he mustn't have been bull bulling
we mustn't have been bull bulling
you mustn't have been bull bulling
they mustn't 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 	
mustn't I bull bull?
mustn't you bull bull?
mustn't he bull bull?
mustn't we bull bull?
mustn't you bull bull?
mustn't they bull bull? 	mustn't I be bull bulling?
mustn't you be bull bulling?
mustn't he be bull bulling?
mustn't we be bull bulling?
mustn't you be bull bulling?
mustn't they be bull bulling? 	mustn't I have bull bulled?
mustn't you have bull bulled?
mustn't he have bull bulled?
mustn't we have bull bulled?
mustn't you have bull bulled?
mustn't they have bull bulled? 	mustn't I have been bull bulling?
mustn't you have been bull bulling?
mustn't he have been bull bulling?
mustn't we have been bull bulling?
mustn't you have been bull bulling?
mustn't they have been bull bulling?