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
she must burp
we must burp
you must burp
they must burp 	I must be burping
you must be burping
she must be burping
we must be burping
you must be burping
they must be burping	I must have burped
you must have burped
she 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
she 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
she 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
she 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
she 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
she 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 she burp?
must we burp?
must you burp?
must they burp? 	must I be burping?
must you be burping?
must she be burping?
must we be burping?
must you be burping?
must they be burping? 	must I have burped?
must you have burped?
must she 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 she 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 she 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 she 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 she 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 she have been burping?
mustn't we have been burping?
mustn't you have been burping?
mustn't they have been burping?