must piffle
Verbe régulier : piffle - piffled- piffled
Traduction française : (UK) dire des bêtises 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must piffle
you must piffle
she must piffle
we must piffle
you must piffle
they must piffle 	I must be piffling
you must be piffling
she must be piffling
we must be piffling
you must be piffling
they must be piffling	I must have piffled
you must have piffled
she must have piffled
we must have piffled
you must have piffled
they must have piffled	I must have been piffling
you must have been piffling
she must have been piffling
we must have been piffling
you must have been piffling
they must have been piffling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't piffle
you mustn't piffle
she mustn't piffle
we mustn't piffle
you mustn't piffle
they mustn't piffle 	I mustn't be piffling
you mustn't be piffling
she mustn't be piffling
we mustn't be piffling
you mustn't be piffling
they mustn't be piffling	I mustn't have piffled
you mustn't have piffled
she mustn't have piffled
we mustn't have piffled
you mustn't have piffled
they mustn't have piffled	I mustn't have been piffling
you mustn't have been piffling
she mustn't have been piffling
we mustn't have been piffling
you mustn't have been piffling
they mustn't have been piffling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I piffle?
must you piffle?
must she piffle?
must we piffle?
must you piffle?
must they piffle? 	must I be piffling?
must you be piffling?
must she be piffling?
must we be piffling?
must you be piffling?
must they be piffling? 	must I have piffled?
must you have piffled?
must she have piffled?
must we have piffled?
must you have piffled?
must they have piffled? 	must I have been piffling?
must you have been piffling?
must she have been piffling?
must we have been piffling?
must you have been piffling?
must they have been piffling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I piffle?
mustn't you piffle?
mustn't she piffle?
mustn't we piffle?
mustn't you piffle?
mustn't they piffle? 	mustn't I be piffling?
mustn't you be piffling?
mustn't she be piffling?
mustn't we be piffling?
mustn't you be piffling?
mustn't they be piffling? 	mustn't I have piffled?
mustn't you have piffled?
mustn't she have piffled?
mustn't we have piffled?
mustn't you have piffled?
mustn't they have piffled? 	mustn't I have been piffling?
mustn't you have been piffling?
mustn't she have been piffling?
mustn't we have been piffling?
mustn't you have been piffling?
mustn't they have been piffling?