must burp
Verbe régulier : burp - burped- burped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must burp
you must burp
he must burp
we must burp
you must burp
they must burp 	I must be burping
you must be burping
he must be burping
we must be burping
you must be burping
they must be burping	I must have burped
you must have burped
he must have burped
we must have burped
you must have burped
they must have burped	I must have been burping
you must have been burping
he must have been burping
we must have been burping
you must have been burping
they must have been burping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't burp
you mustn't burp
he mustn't burp
we mustn't burp
you mustn't burp
they mustn't burp 	I mustn't be burping
you mustn't be burping
he mustn't be burping
we mustn't be burping
you mustn't be burping
they mustn't be burping	I mustn't have burped
you mustn't have burped
he mustn't have burped
we mustn't have burped
you mustn't have burped
they mustn't have burped	I mustn't have been burping
you mustn't have been burping
he mustn't have been burping
we mustn't have been burping
you mustn't have been burping
they mustn't have been burping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I burp?
must you burp?
must he burp?
must we burp?
must you burp?
must they burp? 	must I be burping?
must you be burping?
must he be burping?
must we be burping?
must you be burping?
must they be burping? 	must I have burped?
must you have burped?
must he have burped?
must we have burped?
must you have burped?
must they have burped? 	must I have been burping?
must you have been burping?
must he have been burping?
must we have been burping?
must you have been burping?
must they have been burping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I burp?
mustn't you burp?
mustn't he burp?
mustn't we burp?
mustn't you burp?
mustn't they burp? 	mustn't I be burping?
mustn't you be burping?
mustn't he be burping?
mustn't we be burping?
mustn't you be burping?
mustn't they be burping? 	mustn't I have burped?
mustn't you have burped?
mustn't he have burped?
mustn't we have burped?
mustn't you have burped?
mustn't they have burped? 	mustn't I have been burping?
mustn't you have been burping?
mustn't he have been burping?
mustn't we have been burping?
mustn't you have been burping?
mustn't they have been burping?