must puff
Verbe régulier : puff - puffed- puffed
Traduction française : tirer des bouffées de - souffler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must puff
you must puff
she must puff
we must puff
you must puff
they must puff 	I must be puffing
you must be puffing
she must be puffing
we must be puffing
you must be puffing
they must be puffing	I must have puffed
you must have puffed
she must have puffed
we must have puffed
you must have puffed
they must have puffed	I must have been puffing
you must have been puffing
she must have been puffing
we must have been puffing
you must have been puffing
they must have been puffing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't puff
you mustn't puff
she mustn't puff
we mustn't puff
you mustn't puff
they mustn't puff 	I mustn't be puffing
you mustn't be puffing
she mustn't be puffing
we mustn't be puffing
you mustn't be puffing
they mustn't be puffing	I mustn't have puffed
you mustn't have puffed
she mustn't have puffed
we mustn't have puffed
you mustn't have puffed
they mustn't have puffed	I mustn't have been puffing
you mustn't have been puffing
she mustn't have been puffing
we mustn't have been puffing
you mustn't have been puffing
they mustn't have been puffing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I puff?
must you puff?
must she puff?
must we puff?
must you puff?
must they puff? 	must I be puffing?
must you be puffing?
must she be puffing?
must we be puffing?
must you be puffing?
must they be puffing? 	must I have puffed?
must you have puffed?
must she have puffed?
must we have puffed?
must you have puffed?
must they have puffed? 	must I have been puffing?
must you have been puffing?
must she have been puffing?
must we have been puffing?
must you have been puffing?
must they have been puffing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I puff?
mustn't you puff?
mustn't she puff?
mustn't we puff?
mustn't you puff?
mustn't they puff? 	mustn't I be puffing?
mustn't you be puffing?
mustn't she be puffing?
mustn't we be puffing?
mustn't you be puffing?
mustn't they be puffing? 	mustn't I have puffed?
mustn't you have puffed?
mustn't she have puffed?
mustn't we have puffed?
mustn't you have puffed?
mustn't they have puffed? 	mustn't I have been puffing?
mustn't you have been puffing?
mustn't she have been puffing?
mustn't we have been puffing?
mustn't you have been puffing?
mustn't they have been puffing?